just really, really great
-creative mode where you just make a machine
-single player mode which contains lots and lots of levels. In each level there are some unmovable parts already there and a limited amount of parts for you to place in order to reach a certain objective. You can also create your own levels in creative mode.
-head to head where you take it in turns to place a part and try to make your machine better than your opponents.
The music is great, the graphics are kind of old school but nice and everything about this game is just totally sweet, BUY IT NOW oh wait you can't cos its not in shops but get it off ebay or something. Man this game is so good I'm going to play it right now.