This is a good start, but I'm pretty sure I shouldn't be able to do that...
The original has a little less friction and a little more bounce. If you're still willing to touch the file, try playing with the numbers and work in decimals. In other news, the music is a little loud.
But the art is nice. Pineapple made me laugh. :3
Dunno, just couldn't 'play-and-leave' like I do other games. Hope this helps. :v