Pacman
Use your arrow keys to move Up/Down Left an Right. Press "M" to Mute/Unmute sound, and "P" to Pause/Unpause the game.

Frogger
Left/Right : User your left/right arrows. To move up/forward - use Up arrow.

Tetris
Up arrow to rotate shapes, Down/Left/Right arrow keys to move shapes, press P to pause.

Space Invaders
Space Bar = Fire, Move Left / Right using your arrow keys.