Not as good as it could be
As a whole, the game is pretty subpar. The programming isn't great (I fell through platforms a lot) and the level design is mediocre. To make it better, you need to spend more time on the programming and level design so that it's enjoyable. The whole floating platforms really didn't make it much better The enemies were often put in places so that it's near-impossible to pass with any health left since you couldn't defend yourself. If you made the level design more like a left-to-right sort of platfomer I'm sure you could pull it off, especially if you gave the character you play as the ability to use a weapon or punch or something.