Ok.. That's it, I've finally released the game update, these are basically the improvements:

-Most sprites are improved

-Bowser's design is somewhat changed

-(Bowser no longer has the "Starved Eggman pose" lol)

-Controls are fixed

-There are Easter Eggs: in the world 1-2 and in the Toad part and one where the Game Over you have to press several keys. (hint: the name of the "Red Plumber")

-Some bugs were also fixed (I guess).

I hope you like it!