First, start a one player game, then press the start button for player 2 (whatever you set it to), and voila, you get 16 credits instead of sharing 8 credits among 2 players!

There are 10,000-point medals in this game. First, however, you need to collect an Eagle Medal to have access to them. I find this best works in Level 05. To get an Eagle Medal, when a medal ...