To play the game, use the arrow keys on your keyboard to move left and right. Press the spacebar to change your character's color from green to orange, and walk over green and orange blocks to change their color as well. When you see the spaceship, press the X key to take control of it and pick up Agent Green. Use the arrow keys and the spacebar to move, change your color, and interact with the blocks and spaceship on the map as you try to pick up Agent Green and complete the level.