I ran across a metroidvania called Feudal Alloy set in a medieval world where you and all the enemies are low-tech robots with fish bowls as heads. There's an interesting mechanic where swinging your sword generates heat and if you're overheated you can't attack temporarily. You can upgrade different parts of your body to fit the situation or your play style (more armor/damage/health, slower overheat, faster cooldown, etc), and the art is nice.

Felt like a lucky find for me because I just found out about it last week from an old vid on one of the yt gaming channels I follow (Let's Game It Out if anyone likes watching a dude try to break games by essentially QA testing the hell out of them), and when I checked the steam sale this week it came up for under 2 bucks.