Here are some simple games…
Inglorious Baskets
A javascript game I created in 2003 to demonstrate simple gravity and momentum. Yes, Brad Pitt gave me the idea to rename the game in 2009
http://ianang.com/Tutorials/InglouriousBaskets.htm
Spacian
Auton, the autistic boy imagines his spaceship is under attack
http://autonomicarts.com/Spacian/Spacian.html
Sheepwalker
A true story about an autistic encounter with sheep
http://autonomicarts.com/sheepwalker/
Purple Parade
The skies turn purple in the garden city. Catch the full spectrum of flowers to turn each supertree green again.
http://autonomicarts.com/purpleparade/