window.onkeydown = function(e){
	
	var key = e.keyCode ? e.keyCode : e.which;
	
	if (instructionsOpen){
		if (key == ESCAPE){
			closeInstructions();
			e.preventDefault();
		}
		return;
	}
	
	switch (key) {
		case ESCAPE:
			e.preventDefault();
			closeInfo(null);
			break;
		case TAB:
			e.preventDefault();
			openInfo(null);
			break;
		case 32: //Space
			e.preventDefault();
			if (currentGame.isPaused){
				currentGame.pause(false);
			} else if (currentGame.isStarted && !currentGame.isPaused) {
				currentGame.pause(true);
			}
			if (!currentGame.isStarted){
				currentGame.start();
			}
			break;
		case SHIFT:
			e.preventDefault();
			if (keyIsDown(68)){
				//Shift + D
				deleteMemory();
			} else if (keyIsDown(82)){
				//Shift + R
				currentGame.restart();
			} else if (keyIsDown(78)){
				//Shift + N
				toggleNotifications();
			}
			break;
		case 68: //D
			e.preventDefault();
			if (keyIsDown(SHIFT)){
				//D + Shift
				deleteMemory();
			}
			break;
		case 82: //R
			e.preventDefault();
			if (keyIsDown(SHIFT)){
				//R + Shift
				currentGame.restart();
			}
			break;
    }
}