I like how your game has three distinct feels for the three levels. You have clear goals and the UI provides you with all the information you need. The cars in the second level would sometimes get caught in the walls around the level but would eventually fix themselves. The first level I understood that the pick ups were guns but why turn them green instead of destroying them? That is more of a nitpicky critique than anything. The shooting was responsive and the AI was responsive for the enemies as well. The game itself was very simple but also clear and well designed. Good Job!