I love Mahjongg so this was perfect for me when I got a new DS Lite. You can play it for ages and just not realise the time. I am in my 30's and it has to be taken away from me in the end LOL.
Not only are there games against the clock, you can also play games at your own speed with no pressure.
There is also a quest where you follow a story and play along the way - although some of this is restricted with time which is not so good if you are a beginner.
Just dont play it on the bus going home - u might miss your stop.
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