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2D Multiplayer game engine (chmups)

Multiplayer engine demo...

Multiplayer Math Puzzle

Select any 2 cells on the screen to reduce them by their greatest common factor. If the selected cells are equal, they will cancel out and be removed from the screen. Clear the screen as quickly as you can to win. Play "blind" mode if you want to challenge yourself. Play against friends in multiplayer ranked/unranked battles!