Puzzle Link Game Sample - NeoGeo Pocket Color
Puzzle Link ("Renketsu Tsunagete Pon! Color" or "連結パズル つなげてポンッ! Color" is part of a "series" that came in three flavors: The B&W game, a remake of it in color, and a sequel in color (Tsunagete Pon! 2). The color remake and the sequel would both actually get released in the U.S. under the name of Puzzle Link & Puzzle Link 2, respectively. It's a neat handheld puzzler, though its sequel is certainly superior.
Puzzle Link / Tsunagete Pon! has a pretty simple premise. As Ace, Lyon, Moomy and crew (they have different names in the Japanese game, such as Moomy being Mui Mui), the object is to destroy like-shapes by connecting "pipes" that reach to them. When you have a proper network going, it'll detonate automatically to destroy all like-objects connected to the pipe. From there, falling objects can also be destroyed, creating chains. Destroy objects quickly to raise the stack faster so you can detonate the "C" tiles to clear the stage.
There is a sort of gauge on the left that runs down as you play. Clearing a stage before it empties earns you "Character Cards", strange little cards that you can collect. They don't possess as much of a use as they do in the sequel, but still pose as a modest reward for skilled playing. There are plenty of levels to clear and a gallery which you can view as well as a card collection.
This video shows a few stages within the game with an intentional Game Over. Enjoy.