All the instructions are in the game, single player its the arrow keys, miltiplayer its wasd for player 1, arrow keys for player 2. Heat seaking missles are the upgrades that is rainbow, fast rockets are the light blue upgrades. For HardCore you have to pick a gamemode before playing, beware the random missle. To start the game you have to pick the amount of lives you want, stage you want, and the gamemode as well. GOOD LUCK! and have fun.(Better with two players)