A gravity simulation aiming to copy http://www.nowykurier.com/toys/gravity/gravity.html

• Place planets with the mouse
• Give them the speed and direction you want just by moving the mouse during placement
• Show the path of the planets (press T)
• Move the view (Control + Mouse)
• Zoom the view (mouse wheel)
• The planets collide into a new, bigger planet
• The color of the planet is determined by its mass
• Create a protodisk (press C)
• Cross platform
• Delete all planets with the Delete key

More features to come