Awesome entry! I did one full playthrough on the knight class. I love the class sprites and boss designs. Its pretty impressive you were able to make unique bosses, classes, and upgrades in such a short amount of time. Unfortunately there are subpixels in the player and camera movement. Also on the boulder launchers there are two colors which are not in the jam palette. The game is visually immersive and the audio to signal enemy spawns was a great touch.
Upgrades felt meaningful but I couldn't understand the 3 upgrade slots. I bought a bunch of upgrades before the final level but I only got the $200 power swing added. As you mention there are a few bugs to iron out, the most annoying was playing knight and not being able to hit enemies standing on top of me. Favorite moment was farming enemies for gold and health before the second boss which was also my favorite fight. I really enjoyed playing. Thanks for participating!