diff --git a/src/engine/mod.rs b/src/engine/mod.rs
index becf2d1..9fccf3c 100644
--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@@ -22,10 +22,10 @@ impl Plugin for UBSGEngine{
             add_systems(Update, receive_input.run_if(in_state(GameStates::Gameplay))).
             add_systems(Update, das_and_arr.run_if(in_state(GameStates::Gameplay))).
             add_systems(FixedUpdate, gameloop.run_if(in_state(GameStates::Gameplay)).run_if(in_state(GameloopStates::Falling))).
+            add_systems(FixedUpdate, run_spawn_delay.run_if(in_state(GameStates::Gameplay)).run_if(in_state(GameloopStates::Spawn))).
             add_systems(OnEnter(GameloopStates::AfterLocking), after_locking_routine).
-            add_systems(OnEnter(GameloopStates::Spawn), spawn_routine).
-            add_systems(OnEnter(GameStates::Gameplay), draw_next).
-            add_systems(OnExit(GameloopStates::Spawn), draw_next).
+            add_systems(OnEnter(GameloopStates::Falling), draw_next).
+            add_systems(OnExit(GameloopStates::Spawn), spawn_routine).
             add_systems(Update, draw_board.run_if(in_state(GameStates::Gameplay))).
             add_systems(Update, receive_input_on_game_over.run_if(in_state(GameStates::GameOver)));
     }
diff --git a/src/engine/resources.rs b/src/engine/resources.rs
index 9bb7982..4acd1f5 100644
--- a/src/engine/resources.rs
+++ b/src/engine/resources.rs
@@ -22,6 +22,87 @@ impl Piece {
     }
 }
 
+pub struct Difficulty { // that struct pretty much describes rules
+    pub gravity: f32, // G
+    pub lock_delay: u8, // frames
+    pub lock_delay_resets: u8, // times
+    pub spawn_delay: u8, // frames
+    pub line_clear_delay: u8, // frames
+    pub stack_invis: bool,
+    pub stack_invis_delay: u8, // frames
+    pub next_allowed: u8, // num of next pieces to preview
+    pub hold_allowed: bool
+}
+
+pub struct DelayMilliseconds {
+    value: f32,
+    left: f32,
+    pub active: bool
+}
+
+impl DelayMilliseconds {
+    fn get_delay(&self) -> f32 {
+        self.value
+    }
+
+    fn get_delay_left(&self) -> f32 {
+        self.left
+    }
+
+    fn create(delay: f32) -> DelayMilliseconds{
+        DelayMilliseconds { value: delay, left: delay, active: false }
+    }
+
+    fn reset(&mut self) {
+        self.left = self.value;
+    }
+
+    fn tick(&mut self, delta: f32) {
+        if self.active && self.left > 0.0 {
+            self.left -= delta;
+            if self.left < 0.0 { self.left = 0.0; }
+        }
+    }
+    
+    fn is_done(&self) -> bool {
+        self.left == 0.0
+    }
+}
+
+pub struct DelayFrames {
+    value: u8,
+    left: u8,
+    pub active: bool
+}
+
+impl DelayFrames {
+    fn get_delay(&self) -> u8 {
+        self.value
+    }
+
+    fn get_delay_left(&self) -> u8 {
+        self.left
+    }
+ 
+    fn create(delay: u8) -> DelayFrames{
+        DelayFrames { value: delay, left: delay, active: false }
+    }
+
+    fn reset(&mut self) {
+        self.left = self.value;
+    }
+
+    fn tick(&mut self) {
+        if self.active && self.left > 0 {
+            self.left -= 1;
+        }
+    }
+    
+    fn is_done(&self) -> bool {
+        self.left == 0
+    }
+}
+
 pub struct Board{
     pub width: u8,
     pub height: u8,
@@ -131,19 +212,17 @@ pub struct Engine {
     pub current_piece: Option<Piece>,
     pub board: Board,
     pub handling: Handling,
+    pub difficulty: Difficulty,
     pub rotation_system: PiecesData,
     pub randomizer: Box<dyn Randomizer + Sync + Send>,
     pub next_queue: Vec<Piece>,
     pub hold: Option<Piece>,
-    pub can_hold: bool, // anti-abuse
-    pub hold_enabled: bool, // game rule
+    pub can_hold: bool,
     pub g: f32,
-    pub g_bucket: f32,
     pub lock_delay: u8,
-    pub lock_delay_left: u8,
     pub lock_delay_resets: u8,
-    pub lock_delay_resets_left: u8,
     pub lock_delay_active: bool,
+    pub spawn_delay: u8,
     pub need_to_lock: bool, // when lock resets ended
 }
 
@@ -153,18 +232,16 @@ impl Default for Engine {
             current_piece: None,
             board: Board::create(10, 20, 20, true, true, 3),
             handling: Handling::create(200.0, 33.0, 20.0),
+            difficulty: Difficulty { gravity: 1.0/60.0, lock_delay: 30, lock_delay_resets: 15, spawn_delay: 30, line_clear_delay: 20, stack_invis: false, stack_invis_delay: 240, next_allowed: 3, hold_allowed: true },
             rotation_system: ROTATION_SYSTEMS["SRS"].clone(),
             next_queue: vec![],
             hold: None,
             can_hold: true,
-            hold_enabled: true,
-            g: 1.0/60.0,
-            g_bucket: 0.0,
+            g: 0.0,
             lock_delay: 30,
-            lock_delay_left: 30,
             lock_delay_resets: 15,
-            lock_delay_resets_left: 15,
             lock_delay_active: false,
+            spawn_delay: 0,
             need_to_lock: false,
             randomizer: Box::new(Bag{}),
         }
@@ -183,6 +260,7 @@ impl Engine {
     pub fn init(&mut self, rotation_system: &str, randomizer: Box<dyn Randomizer + Sync + Send>){
         self.rotation_system = ROTATION_SYSTEMS[rotation_system].clone();
         self.randomizer = randomizer;
+        self.spawn_delay = self.difficulty.spawn_delay;
         while self.next_queue.len() <= self.board.show_next as usize  {
             self.next_queue.append(&mut self.randomizer.populate_next(&self.rotation_system, self.board.width as isize, self.board.height as isize));
         }
@@ -200,7 +278,7 @@ impl Engine {
     }
 
     pub fn hold_current_piece(&mut self) -> bool {
-        if  !self.hold_enabled || !self.can_hold {
+        if  !self.difficulty.hold_allowed || !self.can_hold {
             return false;
         }
         self.current_piece.as_mut().unwrap().rotation = 0;
@@ -263,18 +341,18 @@ impl Engine {
             LockDelayMode::ResetOnYChange => {},
             LockDelayMode::ResetOnMovementLimited => {
                 if !self.position_is_valid((self.current_piece.as_ref().unwrap().position.0, self.current_piece.as_ref().unwrap().position.1-1), self.current_piece.as_ref().unwrap().rotation){
-                    self.lock_delay_left = self.lock_delay;
-                    if self.lock_delay_resets_left == 0{
+                    self.lock_delay = self.difficulty.lock_delay;
+                    if self.lock_delay_resets == 0{
                         self.need_to_lock = true;
                     }else{
-                        self.lock_delay_resets_left -= 1;
+                        self.lock_delay_resets -= 1;
                         self.lock_delay_active = false;
                     }
                 }
             },
             LockDelayMode::ResetOnMovement => {
                 if !self.position_is_valid((self.current_piece.as_ref().unwrap().position.0, self.current_piece.as_ref().unwrap().position.1-1), self.current_piece.as_ref().unwrap().rotation){
-                    self.lock_delay_left = self.lock_delay;
+                    self.lock_delay = self.difficulty.lock_delay;
                     self.lock_delay_active = false;
                 }
             },
diff --git a/src/engine/systems.rs b/src/engine/systems.rs
index 1680f86..c9cf3f9 100644
--- a/src/engine/systems.rs
+++ b/src/engine/systems.rs
@@ -1,3 +1,5 @@
+use std::{thread, time::Duration};
+
 use super::{resources::Engine, rotation_systems::LockDelayMode, GameStates, GameloopStates, randomizers::*};
 use crate::engine::components::*;
 use bevy::{prelude::*, sprite::MaterialMesh2dBundle, render::view::ColorGrading};
@@ -390,14 +392,14 @@ pub fn gameloop(
     match engine.current_piece {
         Some(piece) => {
             if engine.handling.sdf_active {
-                engine.g_bucket += engine.g * engine.handling.sdf;
+                engine.g += engine.difficulty.gravity * engine.handling.sdf;
             } else {
-                engine.g_bucket += engine.g;
+                engine.g += engine.difficulty.gravity;
             }
             let mut gravity_tick_happend = false;
-            while engine.g_bucket >= 1.0 {
+            while engine.g >= 1.0 {
                 engine.move_current_piece((0, -1));
-                engine.g_bucket -= 1.0;
+                engine.g -= 1.0;
                 gravity_tick_happend = true;
             }
             let previos_lock_delay_active = engine.lock_delay_active;
@@ -414,13 +416,13 @@ pub fn gameloop(
                         }
                     }
                     LockDelayMode::ResetOnYChange => {
-                        engine.lock_delay_left -= 1;
+                        engine.lock_delay -= 1;
                     }
                     LockDelayMode::ResetOnMovementLimited => {
-                        engine.lock_delay_left -= 1;
+                        engine.lock_delay -= 1;
                     }
                     LockDelayMode::ResetOnMovement => {
-                        engine.lock_delay_left -= 1;
+                        engine.lock_delay -= 1;
                     }
                 }
             } else {
@@ -429,23 +431,23 @@ pub fn gameloop(
                         LockDelayMode::Disabled => {}
                         LockDelayMode::Gravity => {}
                         LockDelayMode::ResetOnYChange => {
-                            engine.lock_delay_left = engine.lock_delay;
+                            engine.lock_delay = engine.difficulty.lock_delay;
                             if engine.lock_delay_resets == 0 {
                                 engine.need_to_lock = true;
                             } else {
-                                engine.lock_delay_resets_left -= 1;
+                                engine.lock_delay_resets -= 1;
                             }
                         }
                         LockDelayMode::ResetOnMovementLimited => {
-                            engine.lock_delay_left = engine.lock_delay;
+                            engine.lock_delay = engine.difficulty.lock_delay;
                         }
                         LockDelayMode::ResetOnMovement => {
-                            engine.lock_delay_left = engine.lock_delay;
+                            engine.lock_delay = engine.difficulty.lock_delay;
                         }
                     }
                 }
             }
-            if (engine.lock_delay_left < 1 || engine.need_to_lock)
+            if (engine.lock_delay < 1 || engine.need_to_lock)
                 && !engine
                     .position_is_valid((piece.position.0, piece.position.1 - 1), piece.rotation)
             {
@@ -458,7 +460,7 @@ pub fn gameloop(
     for mut text in lock_delay_text.iter_mut() {
         text.sections[0].value = format!(
             "{}; {}",
-            engine.lock_delay_resets_left, engine.lock_delay_left
+            engine.lock_delay_resets, engine.lock_delay
         );
     }
 }
@@ -468,10 +470,20 @@ pub fn after_locking_routine(
     mut next_state: ResMut<NextState<GameloopStates>>,
 ) {
     engine.board.clear_full_lines();
-    engine.lock_delay_left = engine.lock_delay;
-    engine.lock_delay_resets_left = engine.lock_delay_resets;
-    engine.lock_delay_active = false;
     next_state.set(GameloopStates::Spawn);
+
+}
+
+pub fn run_spawn_delay(
+    mut engine: ResMut<Engine>,
+    mut next_state: ResMut<NextState<GameloopStates>>,
+){
+    if engine.spawn_delay > 0 {
+        engine.spawn_delay -= 1; 
+    }else{
+        engine.spawn_delay = engine.difficulty.spawn_delay;
+        next_state.set(GameloopStates::Falling);
+    }
 }
 
 pub fn spawn_routine(
@@ -479,6 +491,9 @@ pub fn spawn_routine(
     mut next_state: ResMut<NextState<GameloopStates>>,
     mut game_next_state: ResMut<NextState<GameStates>>,
 ) {
+    engine.lock_delay = engine.difficulty.lock_delay;
+    engine.lock_delay_resets = engine.difficulty.lock_delay_resets;
+    engine.lock_delay_active = false;
     if engine.spawn_sequence() {
         next_state.set(GameloopStates::Falling);
     } else {