Definitely interesting! The Undertale influence seems to be very, very strong but it does do more of its own thing with the encounters, story, and tone (vs Pacifist, at least). It has a sort of surreal fairy tale feeling to it (though with a significant amount of modern day influences too), which is neat.
I appreciate the relatively forgiving health regeneration system and the checkpoints, though the last 2 encounters were still very tricky. It definitely can trigger that "how did I even manage to beat that" feeling at times. The varied aesthetic styles of the encounters are also a pretty cool touch.
It's a minor thing but it does strike me as odd that an RPG-ish game like this would have there be momentum to the player character's motion (they don't immediately stop when you tell them to). It's not so extreme that it's hard to control, but seems especially odd compared to the snappiness of the movement in combat.
Oh, and you might want to reduce the flashing effects in parts of the last encounter (particularly with the background changing). I don't have photo-sensitivity issues but if anyone does that could be problematic for them.