100%:
In order to get 100% at the game select menu you have to find a secret lums 
in the Tomb of the Ancients level. In the first part of the level, after 
having activated the 3 switches that raise the platforms in the poisonous 
pond, jump on these floating platforms and climb the web on the other side. 
Once at the top, instead of just falling down the pit, place yourself at the 
edge of the wall, to the left (when facing the poisonous pond), Then, fly 
over the pond, go as far to the left as possible to find a narrow hall in 
the wall, and land on the platform. Follow this path and kill some pirates 
to get the 1000th lums in the skull's eye.

75% code:
Go near the first frog in the Aztec Level to get the code to get 75% from 
the fairy.