Sporos is a puzzle game in which the object is to cover all of the spots on each puzzle's hexagonal grid. You're given a couple of pieces which when placed on the screen will cover the spot that it's on as well as all of the spots that lie along one or more radial directions, with those directions determined by the pattern on the piece. Things are made a bit trickier by the fact that you can't place a piece on a spot that's already been covered, so the order that you place the pieces matters as well.
After you solve several puzzles you'll find that there's an approach to take with them that will help you in solving the remaining puzzles. This doesn't mean that you'll tear through the rest of them quickly, though; solving the puzzles will still require a little thought and an eye for pattern recognition.
The game's puzzles are divided between two modes, Essential Lab and Experimental Lab. Essential Lab is the basic mode and the puzzles are as I've already described. Experimental Lab makes things more challenging by adding spots on the puzzle that can redirect the coverage lines in different directions. The approach that works with the Essential Lab puzzles doesn't apply as well to the Experimental Lab puzzles, so it will take you longer to work your way through all of the puzzles in this mode.
And that's basically everything there is to this straightforward puzzle game. The game gives you literally hundreds of puzzles, so as long as you enjoy the puzzles you certainly get your money's worth here. If you like your puzzle games to be cerebral rather than reflex-based, it's worth checking out.