Awwwwh, I was so hoping it would look the same as in your video.
Anyway, I played it, though you should add a tip that 4 finger press = reset, it took me a while to figure out.
2. Add a description and an icon to the Zune.
3. Rename it. "Plateformer 1" just isn't good as a name.
4. Is this currently the only level (because I can't seem to end it, even though I am by the words).
Edit: 5. You may want to allow for landscape mode, too. It is kinda hard to know whether you can go further to the right/left (on the Zune). I played it on the pc before, so I knew that another platform would be coming, but the Zune screen just is not wide enough for that. If you'd add the landscape option, one could "sneak peak" to the left/right in order to know whether he can jump there or not.