Mimikry

Mimikry is an abstract game in which you place shells on a grid of 6x6, leaving 3 spaces blank.
Next to every (horizontal) row is a number indicating how many spaces the shells in that row may move (horizontally, vertically and diagonally) to being able to end their movement on a blank space. Every shell that has moved to a blank space gets 'buried' under the sand (thus the 'mimicry' theme) and is turned over.
The game ends when all the shells have been turned over after being buried into a blank space. In that case you win.
When there are still shells left that can't be moved to a blank space you lose.