Shatterdome has updated our forums with the latest version of his homebrew game PSP Helicopter. For those of you who don’t recognize the title, it’s similar to the game Chopper Challenge in which you need to adjust your altitude to avoid the oncoming buildings. Here’s what Shatterdome had to say about the additions in this release:

Multiplier goes up with number of "balloons" collected (every 10)
Speed will increase every 3 multipliers (maxes out at 12, it should anyways, yet to get that far :P)
Some aesthetic changes, better death screen with final score displayed.
Now you can use d-pad up/down or square/triangle to control copter
Some clouds scroll by to obstruct view...