Well... you certainly did try.
My main point of critique is that the level is over in a whopping 45 seconds - a minute at most, and that's if the bumper after the spring throws you for a loop like it did me.
The actual design isn't very interesting either, not offering terribly much in terms of challenge. The enemies aren't placed in ways that could make them a threat, and overall, while I do understand that you aren't an amazing level designer, the least you could have done was make the level a minute or two longer.
Don't let this discourage you from making maps though, I think with enough time and effort, you could make something truly special.
And what can I say, although the level is a little fast and a little slow and there are only two emeralds, but the experiment was successful, as I said, I somehow made the level design better.