The WonderSwan's library of games is basically little more than ports and games based on popular anime. Still, the system does include a few original titles, one of which is Bandai's puzzle game, Gunpey. Gunpey EX is essentially to the Wonderswan Color what Tetris DX was to the Game Boy Color, an old classic puzzle game for the system's predecessor reformatted for the next generation of the system.

Essentially, like most games of its genre, Gunpey EX has no storyline. It does, however, have a great deal of gameplay modes. First off, there's Endless Mode, which is kind of like the typical one-player mode in most puzzle games, just a continuous game in which pieces keep moving upward in a steady motion, gradually getting faster, and when a piece reaches the very top, it's Game Over. Next, there's Stage Mode, where you are given a certain number of panels that increases as the game goes on. If you eliminate all of the pieces, then you go on to the next stage. Then, there's Puzzle Mode, where you are given a number of pieces that you have to link up into a single connection. There's also a Time Attack mode, which challenges you to create the most connections possible in the given time (either 2 or 5 Minutes), as well as a Free Mode, which just allows you to play continuously, as records the highest amount of panels you can incorporate in a connection. There's also a 2 Player Mode.

The graphics in this game are pretty much standard for the Wonderswan. Everything is clear and easy to see. The main draw of this game over the original is the fact that it's in color, which makes it easier to discern between the different colored panels. There are also some nice backgrounds which help to add a luster effect to the essentially recycled game.

The sound in this game is average for the WonderSwan. The music isn't really too memorable, but it typically adds an ambiance to the stages, depending on which background you are on. Also, the explosion sound effects that play when a line is formed or when you lose the game are typical of the 16-bit era.

The control in this game is quite good. Though this game is set up so that you need to hold the WonderSwan in the vertical position to play it, everything is easy to understand. Basically, you use the Y D-Pad to move your cursor, and you use the X D-Pad's Down and Right Keys to rotate the panels, either clockwise or counter-clockwise. The game itself is quite unique. Basically, what you do is create a path with the lines on each of the panels. Once you create a complete line that passes through all 5 columns. There are red, blue and green panels, and you get extra points if you make a line out of only one color. You also receive bonus points for creating a line that incorporates all of the pieces that are currently on the board.

For import value, there's quite a bit. Gunpey is a unique puzzle game, like some kind of Tetris Attack/Columns hybrid, and it's extremely addictive. There has been no American release of Gunpey, though a version of the game appeared on the original Playstation. Basically, I'd recommend this game to anyone who is a fan of puzzle games, is bored by typical puzzle games which just slightly modify the original Tetris engine, and is willing to import a WonderSwan.