Game teasers

Can anyone help, when I download games I dont seem to get the full version, for example when I downloaded SUPER MONKEY BALL TOUCH & ROLL it only has one game within it ( windy city ) yet when I play my daughters friends SMB in the NDS it has several different stages. The same goes for HAPPY FEET only 2 games but no advanced stages. Can anybody help.
CHEERS!

Don't download the ones with (X) or something in the name, those are demos.

Hi! thanks for the reply. None of the games I downloaded had any Xs in them,
CHEERS!