nice concept. playing space was a bit to small for me, maybe start at a larger field and slowly become smaller. It's rather difficult to see 'the outline' of the player. since it's not really an object it is sometimes difficult to see if something is gonna hit you ore not. make a background, preferable with some layers and parallax, this will instantly upgrade your game a lot as it will give depth to your player field.
feel free to try-out and rate my game.
https://itch.io/jam/blackthornprodgamejam2/rate/379449
Kris