This is a very fun (octo)puzzle(r) game. I know you used your own game engine so this might be asking too much, but I feel like a bit more visual feedback (like more camera shakes and maybe a flashing effect when the player reaches the goal) would make it feel a lot juicier. I love the little tutorial windows :D, they are so cute! Very smart! Also, impressive that you did all the art! Even though I can do pixel art too, I can never draw this kind of style. Great work!