It looks like a promising game I personally feel like it's too easy to just run away and not attack and that exp is a little bit slow,I would suggest some sort of dash attack for the monsters and a way to increase our exp gain from each gem other than that it's a fun game,good art.
Edit : Ran into a glitch that made it so no enemies spawned also i've noticed that the snake girls hitboxes are a little bigger than others is this by design?