Nice change-up.
Obstacles coming from the opposite direction made for a welcomed change of pace. True, it's not the highest quality advergame I've ever played, but I enjoyed it for a while. Unfortunately, it got repetitive long before the second level, which was more of the same, except for the flying saucers.
Since the game is essentially and ad, my advice would be to turn it into a one level game and introduce some real-time feedback (i.e., points, health, etc.). Waiting for my end-of-level stats felt like a disociative disorder. (No offense to those of you watching yourselves read this.)
Bottom line... If the game is fun, maybe the product is fun. Get it?