That's a great improvement from the Jam version! it's a fun gameplay loop. I've encountered 2 fun glitches as well, I wouldn't hurry to fix them because they're nice:
- If you get hit at the same time as a level up you will become invincible forever.
- If you click one of the upgrades and then click on the weapon upgrade quickly you can double spend every level, you just need to be quick about it.