This entry looks and feels like a prototype or demo for a future indie game. Music is good, gfx is excellent, nearly no bugs (I also encountered the music bug). I don't play auto battlers so I wasn't sure what should I do, or how I can influence the outcome of the battle, but after a couple of tries I got the basics and won a couple of battles. It may be this genre's quirk, but I feel more explanation is needed to better understand the mechanics. There were some issues I faced when playing: the overlapping dmg/hp over the characters' heads. That first I didn't know which side is mine. What speed is (attack, walk, or both)? Am I able to control which class of warriors I will send to battle next? On top of my head, these. :)
I think you could turn this into a bigger project with adding a good tutorial and developing the idea further. Great work, one of my favorites from the jam.