Red Brick Codes
Enter in the "Extras" section of the pause menu, where it says to "Enter Code"

Makes multiplier available - Every stud collected in game is multiplied by the number stated: Yzphuv
Makes Perfect Deflect available - Deflected lasers always hit a target: 3f5l56
Unlock Dual Wield: c4es4r
Unlock Fast Build: gchp7s
Unlock Glow in the Dark: 4gt3vq
Unlock Invincibility: j46p7a
Unlock Regenerativ Hearts: 2d7jns
Unlock Super Saber Cut: bs828k
Unlock Super Speeders: b1d3w3
Unlock the Character Studs: qd2c31
Unlock the Dark Side: x1v4n2
Unlock the Minikit Detector: csd5na
Unlock the Stud Magnet: 6mz5ch
Unlock X10 Score Multiplier: n1ckr1
Unlock X4 Score Multiplier: 43t5e5
Unlock X6 Score Multiplier: sebhgr
Unlock X8 Score Multiplier: byfsaw
Vulture Droid - Makes vehicle available: 7w7k7s

Game info
publisher: LucasArts
developer: LucasArts
genre: Action Adventure