Glad I finally got to play Mirror's Edge lol. But seriuosly, the gravity mechanic is really cool and seems to be well-executed. I also like the music, it really adds to the moody feel. One thing I found odd was that you gave me a gun, but didn't tell me how to shoot (don't worry, I figured it out). Also early on in Level Four the music just stopped and didn't come back. I wasn't able to get past Level Four but overall it was a good experience.
A great and well-designed entry, especially for a first game. Nice effort!