There is a build a TRESTLE game at http://www.html5pcode.com/a1ytrestle.htm The p-code was written in HTML5 JavaScript.
The home page is http://html5pcode.com
This TRESTLE game allows you to select the beams, bases, and poles that are required to build a trestle. After playing the game for awhile, you will discover a strategy for it. The program uses DYNAMIC PROGRAMMING to find the lowest cost. You can compare your solution with the DP solution. There are 10,000 different games.
This game is written in a p-code. The p-code is executed by a p-code engine. If you click on PROGRAM in the RED STRIPE at the top, you can view the p-code programs. The p-code engine can execute the programs and it can edit the programs.There is a DATA option that allows you to see the program's data as it is being executed. There is a TRAIL option that allows you to execute the program in small steps. There is an RT, Real Time, option that allows you to change the program as it is executing. There are many YouTube videos that will show you how it works.