Also there is no SetBuffer BackBuffer in BlitzMax. You should look at the OpenGL documentation.
Of course I was talking about B3D, therefore not OpenGL but DX7... wasn't thinking about the fact that Bullet Candy is coded in BMax.
I don't use this technique so I didn't get deep about it, but I certainly recall that in DX9 you can set the backbuffercount to 1 (I don't know if OpenGL allows it, though I really hope so). I also assume that SwapEffect is set to discard. This answers to Dreamora as well (moderate your language).
I can tell you that on my iBook your game
It's jkrankie's game, not mine.