Cool concept ! It was kinda painful to not be able to hold the direction key, i had to spam it. Maybe the environnements are a bit too big (empty between enemies).
Also ran into a fun bug : when u get to the exit door if u press more than once the direction key u advance multiple lvls. I gained access to lvl 4 after lvl 1 and lvl 7 (that wasn't implemented i suppose) after that ! X)