If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Antimatter is the new unity 3D game that will give you the sense that you loose perspective when it comes to matter and antimatter. Search and discover new mysteries that are hidden on the walls and try to solved them. Solve every mystery and learn how to use objects in two dimensions. Be one with the antimatter, only then you will understand the meaning of that