The music the artwork the enemies and the boss fight. All of them were amazing. A really good small game.
It has tons of potential. It also looks like it is made 3D while also still being a bit 2D.
Deserves more than it has got until now.
Somethings you can improve:
-Being able to make the game fullscreen.
-Being able to move in diagonal.
Other than that I recommend you to go on with this because this can hit as hard as Minit or Undertale. You can make such a big story from this.