This was such a fun one! Really enjoyed playing the mini undertale battles!
The only UX challenge I faced was, I kept trying to click on the targetter (the little triangle) thinking that was the play button - especially since we click next round on the middle of the screen, and this happened multiple times! Having the end or fight button position somewhere else closer to your player might have been nicer!
I really enjoyed the overall experience and the nicely polished and fun battles