Awesome concept, but short.
The good! Visually, I have no complaints. It looks freakin awesome. The minimap was also very simple and easy to use. Good job.
Now for the critique! Now, it really is a great game, but the levels never get very challenging. The concept is great, and user created levels would be mind-blowing. The amount of fun you can think up is practically endless. I'd love to see more complex levels.
The bonuses just don't shave that much time off, to the point where each flip gets you, what, 1/20th of a second? The cumulative bonuses just don't do much. And besides, there's no real reason to go for the best time. UNLESS you add medals. If you said "10 Seconds gets you Gold" I would play that level a hundred times until I got it. Really, add that if you do a sequel, and give us trophy earning OCD's some incentive!