Beautiful art! The mood and all the particles are super pretty!
I personally prefer my jump on Spacebar, so I had to get used to using W, but I got used to it fast. This game is so hard though. I love myself a challenge thought.
I think either the spike or player hitbox is a little too big, so when I slide down a wall which has spikes on the ceiling, i die to them if i go straight down, which is a little frustrating.
But amazing game, very well done!