The port of Cave Story for PSP now reaches Release Client 1 status.

Author notes:

So it looks like this is going faster than expected. The port is pretty much finished apart from fixing a few bugs in the game’s script where it doesn’t work well with the wider screen. But it is playable from the beginning to the end, and very fun 😀

http://community.livejournal.com/doukutsu/92798.html