A welcome addition to TFU universe, and very cheap as well.
First of all, it costs only a dollar. The setting is Endor, home of the Ewoks. So you get to toss the furry little critters around, as well as rebel and storm trooper soldiers alike. The gameplay is the same as the original title, although I found the boss fights to deal cheap hits, which is a complaint I didn't have in the core game.
But for me, I really enjoy the "What If" storyline. It's a chance, just like in the Hoth mission before it, to get involved in the original Star Wars movies, as you play as an evil character. And while I didn't like how the boss fights are handled, who you fight is a welcome heaping of awesomeness.
The bottom line is if you like the core game, you'll like this. Even if you didn't like the core game, this expansion sort of feels like the first game, so you may like it too. And for a dollar, what have you got to lose?