I bought this game for my Game Boy Colour maybe about a year ago, and it is still going strong. You know sometimes you find a great book, and you cant put it down? Well this game is like that. It is VERY addictive. There are about 150 levels to it, the first 20 taking you through the different types of obstacles you will come up against in the later levels. You are this little blob thing that likes to pair up tiles with each other, but there are puzzles throughout the levels that make it hard. Some of the levels are really very difficult to get your head around, but when you do it really does feel great! The one drawback that I found was, as with any gameboy game, was the password system. Say if you got into a really hard level, and you couldnt get through it, and hadnt written down any passwords and switch it off, you have to start from the beginning. So as you dont know which ones you will be able to do, you have to write down EVERY password, which for a game with soooo many levels is very tedious. Apart from the whole password thing this is an excellent game, and I would definately buy it agin if I was to go back in time, well apart from all the really cool things that you could do if that were possible!