Gunpey: Not lining up

Gunpey is more than a puzzle game: Much like the Game Boy had Tetris and the Game Gear had Columns, the WonderSwan had this as its flagship thing-matching, object-tidying game. To know this but not have played it in either its original form or on any of the other numerous variants that have followed over the years has bothered me for a long time, like a gaming itch I’ve failed to scratch. Although I’m playing on PSP here, the basic rules remain the same on every format. I have to create unbroken lines across the screen using the parts provided, generally for as long as possible (time attack modes are also available), with the aim being to beat my previous high score. These parts automatically scroll up from the bottom of the screen (very slowly, although there’s a dedicated button if I want to force a new row to appear earlier), and if any one of them scrolls off the top the game’s over. The major twists here are that I can swap parts in the same column vertically as I please, but I…