it was a really nice experince even for someone who isn't good at platforming games like me. gameplay is polished and there are no problems with navigating character movements. i really liked music and sound effects, artstyle is simple yet effective. kudos for level design - very intiutive. i wpuld say level 3 is the best because it makes this illusion of massivness but it's actually not that big at all.
i found a few bugs here and there (you c an go backwords in level 4 and get stuck in the air at level 3), sometimes x didn't work properly but overall it was a good experience. i would say i only wished the game had a proper ending or something like that, maybe just a screen that tells you you are good :D otherwise you can get kinda lost in this door cycle.
thank you for this experince, good job!