Drop the blue block. Don't drop the red block.

how to play?

In this game, the player has to attempt the drop the blue block while avoiding the red block. Some of the levels, most notably the earlier ones, only present the blue block, where dropping it can be easily accomplished. However, in other levels, most notably the later ones, there is a blue block and a red block, the latter of which must not be dropped, otherwise, the player would lose.