I'd say of you're bent on hating puzzles, go with coded arms. i played 3 hours continuosly once.
I was all hyped about Coded Arms. After reading gamespots review, not so much. I'd be happy though, if it was similar to Doom in play style. I still go back to that game. Simple can be good. So I'm not sure.
well now that you can play games on ur mem stick why not try them and buy the one you like more
coded arms. no matter how many reviews call it repetitive and all, its still a fps for psp. lumines is ok fun id rather just get the loader