First off: It's a great feat to publish a game, especially if it is one of your first!
There were a few visual kinks and flaws, which I am familiar with in unity (Sprite sorting layers being off, visible gaps between sprites and a flickery/stuttery character when moving). The stutteriness of the character can probably be fixed by moving the cam in LateUpdate() instead of Update() and/or activating Interpolation on your characters' Rigidbody, but I'm not totally sure if that works in every case.
I am a bit irritated by the audio. The noise you hear once walking is pretty annoying in my opinion. Also some sounds get cut out or not played properly often times.
BUT the game already sets up a good foundation for decent gameplay! Eventhough it is a bit hard to kill the slimes once you get close to them, I was able to figure out a few tactics. The game also has some logic like currency collection and buttons that activate doors which is really cool! I'm a bit sad that I didn't figure out how to get past the door after the shop guy but it could've been user error.
Please keep working on learning the workflow in unity (or any other game engine) and you'll get even better in no time!