Does anything happen if I collect all the code cubes?
I know if I collect all the code cubes in the regular levels in a world, I get an extra level. Does anything happen if I collect all the code cubes including the ones in the extra levels?
Solution 1:
Collecting all 100 code cubes unlocks a rare sticker of President Haltmann.
Getting 100% completion on your save file will unlock the UFO power in the Ability Testing Area.