Incredible artwork and character design, hats off. I also liked the clean UI a lot. Music was fine, though the loop seemed a bit too short and got repetitive quite fast (due to it's energetic feel).
The gameplay was alright, though I realized that a fair tactic is to keep 2 out of 3 enemies at relatively low level (preferably slimes) and just focus on one remaining enemy every turn (healing characters when necessary). Also, I was surprised there were no sounds in the game (fighting, healing, rolling, etc) given how many people were on your team.