feat: Implement core game managers, player movement logic, and initial UI scenes.

scripts/managers/powerup_manager.gd

@@ -6,6 +6,7 @@ const MAX_POINTS: int = 12
 const POINTS_PER_BAR: int = 4
 const MAX_BARS: int = 4
 const HOLO_PICKUPS_PER_BAR: int = 4
+const SPECIAL_COOLDOWN: float = 4.0 # 4 second cooldown
 
 var player: Node3D
 var enhanced_gridmap: Node
@@ -13,6 +14,7 @@ var enhanced_gridmap: Node
 # Power-up state
 var current_points: int = 0
 var holo_pickup_count: int = 0
+var special_cooldown_timer: float = 0.0 # Current cooldown remaining
 
 signal points_changed(current: int, max_points: int)
 signal bar_filled()
@@ -21,6 +23,12 @@ signal effect_used()
 func initialize(p_player: Node3D, p_gridmap: Node):
 	player = p_player
 	enhanced_gridmap = p_gridmap
+	set_process(true)
+
+func _process(delta):
+	# Update cooldown timer
+	if special_cooldown_timer > 0:
+		special_cooldown_timer -= delta
 
 # =============================================================================
 # Holo Tile Pickup
@@ -79,17 +87,29 @@ func use_special_effect():
 		player.rpc("display_message", "Not enough power-up!", 3)
 		return false
 	
+	# Check cooldown
+	if special_cooldown_timer > 0:
+		player.rpc("display_message", "Special on cooldown! (%.1fs)" % special_cooldown_timer, 3)
+		return false
+	
 	# Consume 1 bar
 	current_points -= POINTS_PER_BAR
 	emit_signal("effect_used")
 	emit_signal("points_changed", current_points, MAX_POINTS)
 	
+	# Start cooldown
+	special_cooldown_timer = SPECIAL_COOLDOWN
+	
+	# Play special animation (backflip)
+	if player.has_method("play_special_animation"):
+		player.play_special_animation()
+	
 	# Trigger random special effect via SpecialTilesManager
 	var special_tiles_manager = player.get_node_or_null("SpecialTilesManager")
 	if special_tiles_manager:
 		special_tiles_manager.trigger_random_effect()
 	
-	print("[PowerUp] Player %s used special effect! Remaining: %d/%d points" % [player.name, current_points, MAX_POINTS])
+	print("[PowerUp] Player %s used special effect! Remaining: %d/%d points, Cooldown: %.1fs" % [player.name, current_points, MAX_POINTS, SPECIAL_COOLDOWN])
 	
 	if player.is_multiplayer_authority():
 		rpc("sync_points", current_points)