Well.. i think its a overall good upgrade! new and better looking graphics the game looks really smoother than the previus, but that also it. The story-line thing was just crap, and the info between the levels are really lame.. The gameplay coud maby be improved with anything else than squares? 4/5, hard, but entertaining puzzles
I agree with all the other comments, good game, coud need some more gameplay features... i think that if there was spend a little more time doing it, and thinking it through, it whoud have been alot better.. maby a number 2?