It is essential with frames to keep it simple for easy navigation. But it can sometimes get hard and messy - if that's the case STOP and make a non-frames version. Any more than two frames (top and bottom or left and right) and the page starts to get too crowded. Remember people just want to play the game easily, not have to navigate through a 5 star cross country course. Also make sure you set the frame values ok so that none of your words on the menu get cut off.