Many people have noticed a drop off in the amount of homebrew being released for the PSP. Well PSP homebrew developer V@ughn aka bloodles is doing something about that. He has released a homebrew game called Epic Sathe, a stick fighting game for the PSP.
The controls for the game are Square to punch. Triangle to guard. Cross to jump and Start to pause the game. There are a few minor bugs known with this release but V@ughn is working to correct those. You can view the bugs and full changelog at the source page.
Source