Cool game, liked the pixel art especially those background trees (though they are bloody enormous). I appreciated the sheep radar that popped up eventually. The parallaxing effect on them though is really jerky when you're moving quickly.
I'm not sure why your character bumps off the ground so much. When I've used unity tilemaps in the past I've never had that problem. Are you using a tilemap collider combined with a composite collider? Are all your tile assets the same size? When you're importing the tiles, are you slicing them according to grid rather than automatic?