Lego Star Wars is a fun game. You should play it right away.
The story follows the 3 prequel movies (Phantom menance, Attack of the Clones, and Revenge of the Sith).
The characters are LEGO, though. They don't talk and grunt and stuff like that, meaning there is comedy in the game. Watching LEGO people act out Star Wars is pretty funny. The gameplay is an action-type game. You can jump, attack, and use the force at moments in the game. Breaking objects in the game earns you studs (basically money, but LEGO type), which you can spend on characters, cheats, hints, stuff like that. Collecting enough studs will fill up your hero meter, which, when filled, will net you some secrets (and possibly a secret level!). You can also find minikits, which are parts of vechiles that you can see outside of the starting area. Collecting 10 of these earns you a new ship or something to view. It's also 2-player!
The game is also a tad-bit easy. You have 4 hearts, and everytime you get hit, you lose one. When you lose all 4, your Lego character falls apart. When you DO die, you just lose a few studs, and you restart back where you last were. Just a little bit easy.
Graphics are good. It's cool to see how Lego's take the place of many Star Wars characters and items.
Overall, this is a good game.