Home runs:
     Find  an  enemy  worm  standing  fairly  close to the edge of the
level.  Use  the baseball bat to hit him into the water to get a "home
run" complete with baseball bat cracking sound, baseball message (like
"It's Outta Here", or "Bases Loaded"), and organ music.

Super Sheep Racing:
     If  you have collected a crate at the very left of the level, and
the  next  crate  appears  at  the  very  right, deliberately crash or
detonate  your  current  sheep  and  set off a new one. This will save
time.

Bonus scheme 1:
     Get at least bronze in all training modes to open up bonus scheme
1.  To find it go to the multiplayer mode and go through the different
schemes  untill  you  find  one  that  says  bonus 1. This unlocks the
priceless ming vase and the girder starter pack.

Hints, Cool As Ice level:
     The  ice  mission near the start is easier than it looks. Collect
as  many  crates as possible without using any utilities, then use the
jet pack to get up to the next section near the guard. Collect all the
crates  there  and  stand  on  the polar bear's head. P oint the flame
thrower  at a spot just to the left of the guard, and fire. You should
get through the barrier protecting him, and the flames should send him
into the water.

     Strap   on   your  jetpack  and  get  to  the  flamethrower.  The
flamethrower is the most important item on this level. Use it to shoot
at  your opponents. If it does not immediately kill them, shoot a fire
barrel to finish them off.