Bug Report! I encountered a bug where the game crashes:
1. Place a bomb tile at the center.
2. Your rival place a chain-tile (which chains health to adjacent tiles).
3. Use a lightning tile to destroy the chain-tile.
4. The game crashes.
Similar, I've had a few such gliches with other tiles, too. And there seem to be problems is object layers (the cannon tile appears behind the treasure box) as well as camera zoom weirdness (when it zooms in to select an item, if you check your inventory at that time they exceed the bounds of the camera). There's more - but it's a great little game that just needs polishing.