I had an issue where jump stopped working after the first few doors. Couldn't get it to work even after 10 attempts. I did read the description before playing so I knew what to do.
The jump also feels very weak and slow so you probably need to tune the physics a bit too.
I really like the title image you uploaded. You could've added it to the game.(unless you made it after the jam)
If the jump was working properly, I guess the game would be pretty fun as it feels solid, more or less.