A genial logic game: slide tiles to form a group of four or more.
Be warn, this can block your next move!

HOW TO PLAY:

The gameplay is similar to the game of 15: slide tiles to group them by type. A tile can be moved only if adjacent to empty space.

When you group four or more tiles, the items contained are collected and they becomes blocks. The puzzle solution become harder, because you can not slide anymore a block.

This makes it more difficult to collect the maximum number of objects present in a level. Use the logic: when new blocks will be formed you may no longer able to slide tiles and you must restart the game.