Super cool! It's so satisfying when you see your upgrades really have an effect on the enemies, along with super clear progression! The sprites are really nice too, and I like the structure of having a upgrade hut down and it getting harder as you go up! I do wish the boss was a bit harder with maybe a different attack starting when it's at 50% health or something? And maybe once you activate the boss some more intense music starts! But either way super nice game, well done!