Your pixel art is very nice, the sound design is pretty cool! The jump physics is also quite good!
However, it lacks instructions pretty bad... The effects of the objects are not intuitive. Moreover, I had a visual glitch when the view is moving rows of pixel are popping between rows of tiles... Finally, I think you exported the debug version? Was it intended? If not, uncheck the box when choosing the folder in which you want to export your project.