The feeling of the gameplay is nice, and controls are fine. The volcano background reminded me of warioware for some reason. The music is jammy! The player was difficult to see in the background with all the people, try turning down the saturation of the background next time! I like the paralax effect on the platforms! At some point there is a platform too high to jump on top, and too low to slide under, so the run was interrupted like that, and i don't know if mister mustache can arrive somewhere.
However, good job on finishing and posting it! With a win (or lose) condition it would have been a lot better in my opinion