Klax, ™ Atari Games & © Tengen Inc, is a 1989 puzzle game designed by Dave Akers and Mark Stephen Pierce. The object is to line up colored blocks into rows of similar colors to make them disappear, similar to the game Columns. Atari Games originally released it in 1990 as a coin-op follow up to Tetris, and very quickly it found itself ported to the Nintendo Entertainment System, Sega Genesis, and Turbografx-16 systems; followed up by additional porting to many more systems in the next decade.
Never heard of Klax? It's a fun little puzzle game, simple & very addictive. Although it is old school gaming, only 16 colors, and a minimum of sound involved, you'll find yourself coming back again & again to try and master the many (100) levels of Klax. The short Version of "what is Klax?": You control a grey panel and must catch colored tiles that are flip-flopping towards you on a conveyor belt. If you miss a tile, you lose a life. After you catch a tile, you flip it into one of the five slots. Once you connect 3 tiles in a row, horizontally, vertically, or diagonally, (that's a klax), those tiles disappear. Each level requires a certain number, and often a certain type, of klaxes to progress to the next level.
Sounds easy, but trust me, it's not.
This game is yet another testament to pure computerized fun, without any plot or fancy graphics.