from the README:

Its name is Portable bubble, and it is a Puzzle Bubble clone for Sony PSP. It's developed by Germano "Gefa" Fabio.
The graphich instead is by Ignazzi "Gabbo" Gabriele.
In this game, you are free to select and play a level set or a random level (just I wanna remember you that the default level set is by Frozen Bubble's authours.)