Definitely a fun short experiment that can be expanded on. I can imagine a range of heroes or parties and upgrades/alternative bosses to play as. At the moment, it's a little too slow for me. Once you figure out a strafing technique, it just takes forever to do it and I just sat there repeating the same actions over and over. Maybe shorter health bars would help that problem, though obviously the best solution is more variety in gameplay.
All in all, a well-presented jam game.