Pretty neat idea! I found a bug in the L-shaped level with 3 water tiles and 3 crosses, where a bug makes you complete the level if you:
- Place the player and a sea tile on the leftmost cross, and another water tile in the middle cross
- Activate the left water tile causing the player to die
- Moving the activated water tile to the middle cross with the other water tile, making it die
- Moving the flag in the same water tile. When it died the level got completed.
Note: It happened to me once, I didn't try it again.