Brain Training is a nice game, also tried the Maths Training, which was imo not as much fun but good for keeping the gray matter sharp
![Smile :)](./images/smilies/icon_e_smile.gif)
Then discovered Professor Leyton's Curious Village and got hooked to it. Really fun game to play and perfect for those quick pick-up moments when you've just a quick 10 mins to burn.
Then found Gravity on the DS, this is probably my favourite of the lot, simple but great game that does get trickier as it progresses.
[Only] 100 levels though, which I pretty much got through in a single sitting - Not wanting to put that game down. I need a Gravity 2.
Any other great puzzle games you've enjoyed worth checking out?