Whoa this is a really awesome game! Honestly this feels like one of the most "game" like games in the jam where I wanted to keep playing versus others that feel like a basic proof of concept. It felt good to play and was very engaging. Once you get into the swing of things its cool to upgrade your staff and stuff with new abilities.

A few minor things I do want to mention:

• Level Up Instructions - So I played my first 2 games completely unaware that Tab is how you level up. I went through them entirely thinking that the level up was broken because of no new health or damage being done. I then proceeded to be one shot by the boss on level 1. Second attempt I made it to level 2 and died, and was about to quit when I decided to check the controls button... and hey look Tab takes you to the level up screen! I really think this should have been somewhere within the game itself (apologies if it was and I just missed it!)
• Starting Health - Fortunately it seems like the stats from the previous rounds carried over so I decided to give it another third run! I was probably over leveled, but with upgraded stats and staff I was having more of a blast! One very annoying thing though is as you beat a boss and go to the next level, despite upgrading health the health remaining just starts at  40 again. So on level 4 with not potions or heal rooms I got one shot by the basic monster and instantly died. I'm guessing this is just a minor glitch.
• Somewhat Repetitive - The game is great fun, especially for a jam game! But by round 3 it was starting to get repetitive since it only has 3 enemies and a boss that I'm aware of. I'm sure if you had more time there'd be more though!

Anyways overall this was truly fantastic, and out of the nearly 60 games I played this jam, I think this is in the top 10 or maybe even 5 most fun out of them. Great work and good luck if you end up making this into a more full game!!