I've beaten the game...
And it's pretty good for the first flash game, not bad at all. But you need to make the jumping a little better and make some pretty nice graphics, as the first door you pass through it's more like you're passing behind it. I noticed that the ball graphics change from the middle of the game to the end of it, and it doesn't have any music.
The game is pretty cool though, you're going in the right path, if you work really hard and learn new things, I bet that you will makle excellent games.
Looking foward to the progress ;)