You press somewhere at the top to make enemies appear, causing them to fall onto the missile. The missile's health bar gradually fills up; if it's full, you lose. However, if you drop an enemy onto the missile and it touches it, the missile takes damage. If its health bar is empty, you win.
The game is honestly well-made, but it's boring and difficult to understand. It would have been better if you had added more freedom of movement for the enemies instead of just requiring them to press.
