You find yourself in a room with no exits. Colorful cubes move towards you from the far wall, the ceiling, or from beneath your feet. To avoid being squashed you must create matches of the same color. When a match is made, the cubes will explode and destroy any others of the same color touching them. They keep coming, faster and faster.
If you prefer a more relaxed experience then you can play in Solitaire mode. The room starts full of static cubes and you can take your time to clear them.
Difficulty is determined by three options: number of colors, match-type, and where the blocks come from. Once you've mastered three colors you can increase to four or five. If making matches of 3-in-a-row is too easy, then switch to a block-of-four. If you prefer to be squashed from above or below then change the direction the blocks come from. In total there are 36 variations of play.
You have the ability to: change the color of a cube, add a new cube, or push a cube when it's close to you. You can run the tutorial to get familiar with each control type.
The goal is to get the highest score you can before you are either crushed by the cubes (in Survival) or you clear the room (in Solitaire). If you remove cubes quickly then you earn a multiplier allowing you to increase your score rapidly. Each of the 36 game modes has a leaderboard dedicated to it. Get your name up there and challenge your friends!
The only question that remains is - what's outside the room?