How you play is you use the arrows to move and press the space bar to shoot a fireball. The Blue is a safe spot. You cannot shoot inside the box. When endermen touch the blue spot they spawn to a certain spot. Get to the gold/yellow square to win. The endermen are obstacles. There is a cheat.
I used this from a book and my teacher helped me add some more stuff. If endermen are stuck, then press "See inside". Then, move the enderman/endermen. If you keep dying after you press start, then press "See inside". Then, move the enderman/endermen.