Weird icons and uses:
Go to a Mission Drop screen, press up and an icon will appear in the bottom right of the screen. Press right then up and another will appear - once more and you have three - press up or down to scroll through icons and left/right to choose icon column.

Combinations:
Target/Target/Spyder: start w/ 8 points, secret spyder level
Spyder/Target/Target: start w/ 8888 points, secret spyder level but you go up instead of down and it never ends Also has no music.
Target/Mootix/Babaa: You're invisible, start with 5 points.
Babaa/Target/Spyder: Fall much faster, start with 5 points.
Mootix/Target/Babaa: The whole screen is upside down, starts with 10 points.
Babaa/Mootix/Spyder: HUMONGOUS mootix.
Mootix/Target/Mootix: TINY mootix.
Spyder/Target/Mootix: FAST mootix