This is a colored block, you click on these to play the game.

This is what was referred to in the introduction as the “game board”, this is where the game actually takes place.

This is the game timer, it starts the first time that you click on a removable block.

This the remaining block counter, which also doubles up the score counter. It is usually black at the start of a game, it changes to blue if the score is good enough to get onto your local highscore table, and red if it would make the top spot.