Instrucions are writed in game. You're a basic, house cat, and your owners buy a new curtains... It will be a war. When you start a game, click on curtains and just "scratch" it. You earn coins when curtains are swinging a lot. You can buy pets for coins, for now only one, but even it doesn't work yet :<. the simulation sometimes breaks if it moves too fast
Thanks for @weegaweek for physics engine! I enjoyed simulation this much, I made a game :)