Your aim is to land space ship to the Mars. In the panel «Input» you can manage force and time (formulas: acceleration = force / mass - gravitational acceleration, mass = 100 kg, gravitational acceleration = 3,86 metres/second^2). In the «Control» you can control all time, height and speed (formulas: height = 1000 metres - speed * time). In the Alt game you can only tap Start to land. Now you now how to play this game!