There is a couple of different modes that you can choose from, ranging from classic, to a story mode, to a mode where you have only so many moves to solve the entire tetris block. There really is a lot of content here if you're looking for a deep game. It starts off pretty easy, but once you start mastering the basics, the later levels are quite difficult and challenging.
The graphics and sound are okay; nothing great. Everything looks nice though, and it sounds decent enough while you're playing Tetris. Nothing horrible in that department.
If you're looking for a challenging spin off of Tetris, then look no further than Tetris Attack. It's cutesy outside may shun some players, but don't let that discourage you. Check this game out, and see for youself!