its okay.
I hope it didnt really take you 6 months to do this. Its not exactly original, or hard at all. its relatively short too. here's some things to improve
Get rid of the annoying mario music
Add enemies and more levels
Add sound effects
Have a plot or something
Go look at other mario games. They have double jumps, kicks, punches, and originality in most of them. Do that. Add attack moves, and do more then a jump platformer. If you do all of this (alot more work of course) then add a tutorial so people know what to do. I had no idea that you were supposed to click the win or loser button, but apperently you do.
put on a higher framerate