Ofcourse, i had just gotten the wallgrab and was trying to climb up walls. I dont know exactly where but i climbed up a wall and got above the screen. So i kept climbing and then i started to fall down off screen and got to other rooms.
I think i just climbed over a ledge off screen and fell down.
Alright thanks, I know exactly what's going on. There's another place on the horizontal opposite of that where you can do that too, I'll get them both fixed for the post-jam update!
Oh and btw, not that it matters anymore, but I forgot to put in the description that there's a "respawn at last checkpoint" -button, F9. I've updated the description now tho...