Hey very nice game!
I have to say using W to jump makes it harder to play when you have the movement keys to the sides, maybe making SPACE to jump and adding arrows for extra movement will make it easier to play and avoid spikes.
Aside from that I really liked what you did with the room transitions, one thing to mention is that having spikes on the other room at the background makes me dizzy, idk if they are on the actual room or in the back room haha
I think adding a low-fi background music will make it a nice and chill game to play at breakfast :D