In a word: sucks. Read on for more info.
Graphics:
Even for a Nintendo 64 game, the graphics on this game suck. I'm not one who cares about them, but this is really disgraceful. It's garishly bright ofrdull, no happy medium. Sometimes some items are unintelligable! Looks a LOT better on the box than it does on a TV screen believe you me. Not a lot else to say except even the MENU is ugly.
Gameplay:
Now, I'm not one to hate a game because it's hard. One that isn't explained well at all (even in the none explanitory training levels) fails to make compellling play. You build walls, fill it with water, simple no? No. The controls (see controls section) make the gameplay extremely complex, and unfulfilling. There is no story, no plot or point ot this game, it is in effect lifeless and quite frankly a bore to play. Lack of some sort of grid on the floor makes placing pieces precisely impossible, you'll have to make do with a lucky guess.
Sound:
Rubbish music. Rubbish sound effects. All over rubbish. Bombs squeal, water attempts to splash but sounds like a blanket blowing in the wind. Music makes you fall asleep. I've heard better things come from the original gameboy. I advise you mute this game, it makes it seem less painful.
Controls:
Oversensitive, clumsy and uneffective. The blocks move so fast if you so much as tap the joystick it's impossible to get them where you want them. The buttons chosen don't work well at all and makes execution of moves very hard, when it could be done so much simpler.
Overall:
I was ripped off at £2.50, don't let it happen to you. I advise you stay away and spend your money on something more worthwhile, like piano lessons or ninja school.
Summed up in 4 words:
Gamespot is SO wrong.