This game plays exactly the same as my earlier version with two exceptions. They are:
1. This game will only run properly with Algodoo version 2.1.0 b8 or later.
2. Instead of selecting squares with your keyboard number keypad, you select squares by clicking on them with your mouse.
Enjoy!
UPDATES:
1. Entire squares are now clickable (no need to click on the number)
2. You reset the game by clicking on a text box.
3. New exciting colors!
4. Clinically proven technology!
5. But wait! There's more!
6. Um.... no, not really.
7. My thanks go out to s_noonan for his many good suggestions, and for helping me to debug my scenes.
Update 6/20/2020: Made a few cosmetic improvements.