Remove 4

Game Description
Fill the grid but not so full that you run out of moves. As long as you keep clearing the board, the game will never end!
How to Play
Drag each puzzle block to the playing area. Try to position the blocks in a way that connects four squares of the same color. When this happens, the four squares are removed from the board freeing up space for additional puzzle blocks. Once a puzzle block is placed, it cannot be removed.
Tags
puzzle, clear the board
Skills
spatial reasoning, making decisions