black hole square plays its concept straight: a puzzle about a hungry void and the shapes it swallows. The name hands you the mechanic, a black hole set loose on a square board, and the fun is in figuring out the order and angles that clear the space. Puzzle games in this vein reward reading the whole layout before you commit, then watching a tidy plan fall into place.

There is a clean, tactile logic to a puzzle built around one simple force, and this one keeps the framing minimal so the thinking stays front and center. It runs free in the browser with no download, which makes it an easy pick for a quick mental reset. When you have solved your way through it, there are more puzzle games waiting.