Thanks for the feedback. Regarding the health bar, it's visible in the bottom corner, but it's probably something no one notices, and the damage effects don't help. I didn't get around to polishing that since I rushed the game. As for the fourth character, I had several issues. Initially, he was supposed to be the slowest, but his original speed made him quite slow. So, I increased his speed so he'd move somewhat quickly, but not so quickly that he'd outpace the other characters. As an extra step, I made it so that instead of having a fixed damage per second, he could slightly change his damage, and I think I overdid it. I didn't realize because I was testing the other three characters more than the fourth.
I don't know if I can fix the problems it has since I rushed the game and I forgot to add some bosses that were going to appear in the final version (I might post their concept sheets). Also, this is a game jam, so I'm not sure if I can fix the game. But thanks for playing anyway.