Why are there picture/black corners onscreen?
This version of the game was ported primarily for the PSP (which is also why the base resolution of the game is 480×272), so we tried to use as much screen real estate as possible. However, the original game was not designed for widescreen, and as such, some “tiles” would be missing around the screen corners, when moving on the exterior map. As this would have had a detrimental effect on the estethics of the game, we chose to hide them using “picture corners”.