It was a little frustrating at first but once I learned the mechanics it became more fun to play. I wish I could skip the introduction dialogue, I died twice before my successful run almost immediately since I didn't know the controls yet, so I had to sit through it a total of three times. It also would just be good for those who want to re-play the game.
Rewarding the attacker by restoring their health is a good way to give player reward and agency, every encounter feels pretty high stakes even if it isn't, which is good for a game like this. The mechanics are admittedly pretty simple, and you being able to add customization to the game is pretty cool for a jam game.