Although an almost direct port of the PSP original, MMR is still a great game with a few minor niggles.
Your basic goal in each level is to guide your blob of mercury to the goal. Of course, it's never as easy as that. There are many elements that are out to stop you from getting there, including spikes, crushers, blobs of acid and giant hammers. There are also different coloured gates that you have to get through, and in order to do this, it may mean having to use the scenery to split up your mercury into separate blobs, and change their colour at colour stations. You can also combine the two colours to makes a totally different colour. There will also be times where you have to activate pressure switches that need a certain amount of mercury to use, go below that amount, and you fail the stage. There's definitely a lot of variety in the stages, and each world adds a new element to the mix to keep things interesting.
Don't think this game is a cakewalk though, the later levels are fiendishly difficult, almost to the point of insanity, and you'll have to use every ounce of wit and intelligence to pass them. In order to get 100% on a level, you need to collect all the pickups in the level (most of which are in hard to reach areas,) finish with 100% mercury and beat it in the fastest time possible. Fortunately, you don't have to do all of this at once, which you will most likely never do, but it still adds even more replayability to the game.
New to Revolution is the inclusion of two entirely new worlds and a few mini-games. Sadly, the mini-games are the weakest area of the game, as they're either just not enjoyable (rodeo), or too tedious to even bother with (racing), which is a shame, as they definitely could have been very well done.
Graphically, the game is ok. The cel-shading and the garish colour schemes keep everything bright and interesting, but they're nothing to shout about. The music is pretty bland to be honest. Levels continuously recycle tracks from previous levels, and pretty much all of them are instantly forgettable.
ost people who played the original will most likely feel cheated out of this game, as most of the stuff has been directly ported, and that which HAS been added isn;t all that good either. If, however, you didn't play the original, then this is still worth a look, especially if you like a challenging puzzle game. You certainly won't breeze through this one.