One of the best games I have seen so far! I just love the voxel art and the upgrades feel nice.
If you really want to continue the game, here are some things I'd really like to see:
- choosing a door gets boring after a while, so maybe add doors with different risk/reward levels. For example the first door always gives you a slight buff, the second door better buffs but sometimes debuffs etc.
- more enemy types, bosses and weapons of course (I found the rebound with rocks pretty amazing, maybe you can add to this)
- adding a dash as an upgrade is pretty much a must do
and I found a bug:
- When looking at setting/controls and then pressing esc will contiue the game with the panel still there
Overall amazing job, hope you win the jam and continue the project!