Quite a complete game for a jam, having a little story at first, then an open map. Followed by caves with a map for them and the upgrades. Honestly good job.
The combats feel a bit slow before upgrading attack, however, I liked the way you used mimic. I felt like having to use the mouse to select the attack/def/mimic THEN using keyboard to select target is a bit counterintuitive, I personally try to focus on mouse only or keyboard only.
Nevertheless, well done Boebi! Great game :)