Algodoo

You should explain how to operate it. There are no instructions.

Well I think that the keyboards are down and up

Okay! Now I see how it works!

Since you are fairly new here on Algobox, I have a suggestion for you. Whenever you make a scene that uses the keyboard or the mouse to control things in the scene, it's always a good idea to explain what those controls are and how they work. Without the explanation, people have to fumble around trying to figure out what keys do what.

If you wanted to, you could edit this scene and explain the control keys (up arrow and down arrow) either in the scene or in the description. People don't always read the comments, and so it's best to put them in the scene.


Thanks!