Hello, sorry that you encountered this problem. You should normally see a quick summary of the game controls on the bottom left side of the game when you're in the lobby. "Left" and "right" to move around, "space" to jump, "R" to reset a level, "Esc" to leave a level and "up" when you're in front of a door to enter the level.
If I may ask, what device are you playing on ? It could explain why the interface doesn't show ? Though I'm honestly not sure ^^ Let's hope we can figure it out so you can try the game as intended.
Viewing post in Fractured jam comments
Thank you! You saved me! For some reason the only key I did not try is an UP key, and it was not clear for me from the UI hints that I have to press it to enter the door.
Now when I played it, that a very, very clever game actually! Beautifully design and well executed! Starting a level over and over after one mistake is not my thing, but even with that I finished half levels because of how interesting they are.
Great game!