Balancing energy and attack upgrades was really fun, meow!
If I mismanaged my energy, I sometimes couldn’t attack at all and just had to die, though—meow.
The shotgun-like weapon that fires lots of bullets had amazing synergy with damage boosts and felt super strong.
I probably played version 0.9.4.0, but the game crashed while I was playing, meow! (ΦωΦ)