Here are the basic items needed to build your own pinball machine. Just follow the instructions in the scene, and after you have thoroughly tested your version, you can go ahead and upload it to Algobox and show it off to others. You have my permission.
Besides the group of spare parts provided on the right side of the pinball machine, you can add your own bumpers and spinners. Just remember that they must be set to collision layer "G" in order to work properly. If you have any questions, please leave a comment for me.
You can get some ideas for where to place the bumpers and spinners from one of my previous pinball machine scenes. Just click on the following link:
Pinball Machine
Update: 1: Added a wood grain texture to the playfield.
2: Corrected text for angled bumpers (they add one point
to the score for each bump).