diff --git a/pacman-project/adt/game.rkt b/pacman-project/adt/game.rkt
index dba9ca6..590a156 100644
--- a/pacman-project/adt/game.rkt
+++ b/pacman-project/adt/game.rkt
@@ -34,8 +34,12 @@
           ((draw 'animate-pacman!) delta-time))
 
         ;; start! :: -> /
-        ;; Starts the game by registering all callbacks.
+        ;; Starts the game by registering all callbacks and change listeners.
         (define (start!)
+          ;; Wire level change events to draw dirty flags.
+          ((level 'set-on-coins-changed!) (draw 'mark-coins-dirty!))
+          ((level 'set-on-maze-changed!) (draw 'mark-maze-dirty!))
+          ;; Register graphics callbacks.
           ((draw 'set-game-loop!) game-loop)
           ((draw 'set-key-callback!) key-handler)
           ((draw 'start-drawing!) dispatch-game))