This was fun! At first I went for the magic upgrade, but the ka-me-ha-me-ha took a bit too long to charge up and didn't seem to one shot things. On the second play through, I prioritized attack speed and damage.
* I wish the attack filled out entirely in front of the character, instead of being a little bit of distance away.
* I wish there was an indicator where the chests were
* Honestly, I wish "more time" was not an upgrade on the chests. I just wanted to have more skills / abilities
Solid survivors-like. Well done!