I like this, but it has some issues:
- Some eye blocks can't be attacked, also had it happen with a heart a couple times.
- Energy per resource upgrade is too OP, was forced to wait out the time (several minutes). Nerf it or at least make a "return early" option.
- Got notifications of a zeppelin? Only ever saw one on upgrade screen, can't interact with it. (Just noticed a red gem spawns when it happens?)