PSP homebrew coder shadow77340 has just annouced the release of PSPsokoban v0.8. For the guys wondering what this application is, it's a homebrew game based on mariosokoban, in turn based on the traditional Japanese game of sokoban. As for the new features in this release:

4 new characters: Peach, Yugi, Aiai (Character of Monkey Ball) and the Red handler from Pokemon Fire.
Addition of 3 new levels
Bug erasing the best scores corrected
Recasting of the menu of confirmation
Chamgement of music during the possible play from now on by pressing X
Improvement rate loading enters the level, time almost reduced with 0
Sounds WAV converted into OGG for saving of space and time of loading
2 new possible messages at the end of a level
The CPU is put from now on at the good frequency in the Editor Mode and Simulation
New icon

As for the controls:

Controls in the Editor mode:

Circle: To put a way
X: To put a wall
Square To put a case
Triangle:: To put an objective
"L": To put a character
Start: To save Map
Select: Return to the Menu

Controls the Simulation Mode:

Directional buttons: To move (Joystick Also)
Select: Return to the menu

The bundle is available below - make sure to have your PSP Brew application handy to convert it to its corresponding fw version. shadow77340 has also released the game's source codes, in case you guys are wondering how it was made. Enjoy your download!