feat: fix the block pushing; add new groups for walls and pushable objects;

Scenes/Player/player.gd

@@ -3,6 +3,7 @@ class_name Player
 
 @export var move_speed: float = 100
 @export var hp: int = 10
+@export var push_strength: int = 50
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
@@ -33,10 +34,9 @@ func _process(delta: float) -> void:
 	var collision: KinematicCollision2D = get_last_slide_collision()
 	if collision:
 		var collisision_node = collision.get_collider()
-		if collisision_node is RigidBody2D:
+		if collisision_node.is_in_group("pushable"):
 			var collision_normal: Vector2 = collision.get_normal()
-			collisision_node.apply_central_force(-collision_normal)
-	
+			collisision_node.apply_central_force(-collision_normal * push_strength)
 		
 	move_and_slide()