I managed to get to level 8 before running out of time. Really liked the variety in environment, the parallax background effect, and the misc. particle uses. I liked the "mid-air attack to cancel out your y velocity" mechanic. I found the game a bit tricky to control, and I was bummed out about the time limit—it seemed like I was pretty close to the end.
The pixel art was very nice. Area 3 was my favorite, good music choice with it too.