In this game, called The Defender, your mission is to protect the base from enemies. Press space to shoot bullets. In easy mode, the boss appears every 15 seconds and has 15 health. In medium mode, the boss appears every 10 seconds and has 10 health. In hard mode, the boss appears every 5 seconds and has only 5 health. If you press 1 or 2, your costume will change, and in costume 2, the bullets become bigger. If the bullets hit the boss, the boss’s health will decrease by 3.