Also platapus has quite a few levels of parallax scrolling.
Yup, but I think Platypus was Blitz2D, not BlitzMax. Oh wait, you probably mean the Mac port that Michael did? That might be BlitzMax.
edit: out of interest is Bullet Candy purely using the "out of box" glmax2ddriver?
As far as I know, it's the out of the box Max2D stuff, I'm not sure if it's the D3D7 or OGL driver though.