[spoilers=Mebbeh spoilers?]I liked the little intro thing, especially how everything lights up when you land. I also like the part where it says "I guess you can trust your eyes," then the black blocks next to the "can" disappear, revealing the word "can't". Little things like that are pretty cool.
But, as LPChip said, it's not groundbreaking or anything, but with practice, it could be a lot better. Also, you should probably add more decorations, mainly in the background. As an example, you could look at
Drakkan's "Gaia" or
my own "The Mysterious Grotto" or Nifflas' "The Machine". Notice how they use a background pattern. It adds a kind of depth to the game. Also, the cutscene where you release the light is...poorly done. I suggest downloading GIMP or Paint.net (they're free) and using that. If those are too complicated, you could always try your hand at custom objects and try to make a smooth transition with those. Also, I think it's a bit weird how, even when the light comes, the ground is still dark...
But, other than that, this is really well done for a first level! Just work on what I said above and this'll be pretty good!
[/spoiler]