Interactive Mouse Toys

In studio today i'm looking at interactive applications from open processing. So far I have found two that blow my mind.

http://www.openprocessing.org/visuals/?visualID=30891
That link links to an application called Nebula Generator. In this, there is no interaction of the user and the application by clicking or using the mouse, however the user can change the settings which generate the nebula. For example you can change the colours, the style of nebula. I think this is a good reference point in terms of the way colour is used in an application.

The second application that blows my mind is this:
http://www.openprocessing.org/visuals/?visualID=30805
In this link the user moves the mouse around and is chased after by a structure like thing. The way the structure like thing is made can be changed/influenced by the user. This would be a good reference point for me in terms of making something that i constantly being changed by the user and is alwys giving a different reaction.