Almost reached the cookie... The game kept me engaged surprisingly long. I think the music played a big part of that. Level design was nice but the player collider was too big for my taste. There were too many cases where the character visually wouldn't hit the spike but the collider doesn't give any room.
I noticed the music is spatial? I would probably take that out unless it's by choice. One of the irks was when resetting and there is this jarring sound. You can do this by changing the AudioStreamPlayer2D to a regular AudioStreamPlayer.
I think this game reminded me that a lot can be done with fewer assets.
Well done!