I'm a little torn on your game to be honest. Your idea was unique, you delivered well on your core concept, and game was a nice challenge, but the physics movement made it feel really bad to lose and felt more lucky than rewarding when won, even if I tried to plan my route well in advance. I feel like the game would have worked better with more precise movement, or at least have the momentum aspect toned down some what.
Everything else was so good, the camera view, the concept, the graphics, the enemies, the shooting.. You made a very good game overall.