Fairly easy to understand game. Great job! I wish the platform was a more zoomed out. I feel all the aliens are a bit too close to each other already, making it hard to stay alive. Also, I feel since there is 5 aliens, you should allow three of them to crash, and for the last two have something come out and try to hit them (like a ball, or a laser shooting at the last two aliens). I feel this would make more competitive, and allow you to want to keep playing the game longer.