Is there only like five levels which loop endlessly? After 10mins or so I stopped playing because it was just the same every time. Also the jump heigth and movement speed is directly dependant of the number on the upper left which makes it super buggy when you dont upgrade in the menu. Basically flying and moving super fast through the game is possible. Also you can throw boxes on the upper level which is out of screen. You can jump out of the menu by spamming jump. Those are all bugs...quite a few
Nevertheless, the gameplay is additive and if only there were more diverse levels and some polished controls it would be a great experience.
Overall I enjoyed my playthrough. Consider checking out my game too :)