First up, this isn't usually the kind of game I play, but it was cheap in the local fleapit, so I thought I'd give it a go. After looking around a bit for cheats and whatever (and not finding a great deal), I had a peek at the game's intestines. At first glance, not a lot, but there were some level files not included in the level listings (more on this at another point). However, there was also a file called Game.txt. I've seen these in other games and knew that they usually included information, plus some options (which, if changed, never had any effect). Having a go at hacking this in Notepad, I changed the following options to "On":
DEBUG_CHEATS (Are debug cheats on/off)
DEBUG_TEXT (Display debug text/gfx//DMK)
DEBUG_FLY (Fly-through mode on/off)
LEVEL_SELECT (Level select on/off)
There are other options to play around with, but as an initial investigation, I chose the obvious ones. Saving it and integrating it back into an image of the main game, I ran it on my PSP. And, they worked! Never has a hack been so easy with a game! It is interesting that the loading screen now identifies the game as a "Pre-Certification Build", suggesting a (very late) beta version.