Summary: I guess I thought the the title: Puzzle World was all I needed when it comes to looking for a good brain game for PSP. I was wrong.. The Cheesy games to choose from are not what I expected when I recieved and opened this one... I know that's all my fault.
Conclusion: I updated my PSP's firmware to version 3.52 and everything seemed fine.....until I turned the PSP off and then back on again later. Now four out of the 5 games are temperamental (ie. they freeze at random intervals) and the original Buster Bros. game won't even load anymore.
Conclusion: DO NOT BUY THIS GAME.It does not work on psps with firmware 3.50 & 3.51.Capcom knew about this a month ago but still decided to release it. search google "capcom puzzle world 3.50". Your PSP will freeze then turn itself off within 2 minutes of loading.