Please don't put "my first game"s on NG or really anywhere on the internet for everyone to see.
First, don't use the Flash IDE to code. It's an animation IDE, not a code IDE.
Framrate's locked at 24 FPS (which is bad in and of itself) - but it makes the controls that much more floaty and hard to control.
Hitboxes are way off, use pixel-perfect collision detection rather than bounding boxes.
Most people use WASD, which a lot of Flash programmers fail to understand for some reason. Allow rebindable keys to solve all of the issues present with keyboard layouts and the like.
Don't use password systems, they're awful.
The graphics aren't great. At all. There's also no animation whatsoever, though that's helped by the fast that we seem to controlling a ball (there's a pattern to most of these Flash game I play, isn't there?)
Music and sound are great, then I don't have to listen to emptiness.
More visual/audio feedback is always good when you collect rewards. Something that makes you feel good instead of just... Nothing.
Space key is commonly used as a jump key, not an interact key. Tutorials or even intuitive controls would help.
The end is... Well, yeah.