Enough philosophy, let's discuss Blackflip, a remarkably well-produced Flash puzzle game and website inspired by the game Polarium, which was created by Michell Corp. and released for the Nintendo DS.
The goal of Blackflip is to flip the black and white tiles so that each row is the same color. It is not necessary to turn the entire puzzle into one color. To flip tiles, click and drag on the tiles to draw a single continuous path through the tiles you wish to flip. You have a small amount of gray border with which you can travel around the puzzle, if necessary. If your one path flips all tiles in a row to the same color, the victory is yours!
All levels are made and submitted by fellow Blackflip players, and are solvable in at least one way. Using the level creator, you can create a puzzle as large as 13 squares wide or high. But before you can submit any near-impossible hoo-haw, just remember that for a puzzle to be listed on the site, you have to prove it's beatable by being the first to solve it! As a bonus, you can link to your own puzzles on your website with the provided tags.
Blackflip, created by Flaboratorium, comes packaged in a very nice website with fun graphics and a music player built right into the experience. (Look to the bottom-left corner to change tracks and adjust volume.) With an ever-expanding menu of solvable puzzles, can you solve them all and become a Blackflip master?