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PN Scripts

Game templates

Trussmere Game Template

by PN Scripts

The complete source of Trussmere, a bridge-building physics puzzle with live member stress, three materials and 12 gaps; the test drives a cart over a stored bridge for every gap.

  • JavaScript
  • Canvas 2D
  • Web Audio
  • Playwright
  • Coming soon

Coming soon

Not published on its store yet, so there is no buy or download link. PN Scripts does not take payment for it here.

Game templates
A half-built wooden bridge over a narrow gap with the joint grid and the budget meter

What it solves

The gap

A bridge builder needs a stable solver that reports believable forces per member, plus levels that are known to be beatable within budget.

What it is

This template gives you a compact XPBD bridge solver, a level format with verified designs and a finished, touch-ready game around them.

How you use it

Unzip, serve the folder and open index.html, then edit game.js; npm test plays it again in headless Chrome.

Source code of a real, playable game to reskin and learn from, with a smoke test whose bot plays it.

Who it is for

Use it when

  • Publishing your own bridge-building physics puzzle on itch.io, web portals or your site.
  • Learning how a complete bridge-building physics puzzle is built in plain JavaScript and Canvas 2D.
  • Building a branded mini-game for a client.

Built for

  • Web and indie game developers who know some JavaScript.
  • Developers who want a finished, tested game to build on instead of a blank canvas.

What you get

Physics

stepSim() runs substeps of position-based dynamics; each member's multiplier becomes its force, which is smoothed and compared with the material strength.

Levels

A gap is two cliff columns, extra anchors and a cart type; the budget is derived from the stored design, which the test drives across.

No build step

Plain JavaScript and Canvas 2D with no runtime dependencies; open index.html through any static server and edit game.js.

A smoke test

A headless Chrome test loads the game, checks the console, presses keys and taps, and lets the built-in bot play a run to its result screen.

Specs

Availability
Coming soon
Vendor
PN Scripts
Type
Template
Platforms
JavaScript
Pricing
One-time purchase Price to be announced.
License
PN Scripts Template Licence 1.0
Deployment
Download (ZIP of source code)
Maturity
v1.0.0

Compatibility

Platform or runtime Supported versions Tested up to
Node.js 22.12 or newer Not stated

Stack

  • JavaScript
  • Canvas 2D
  • Web Audio
  • Playwright

The Trussmere template is coming soon

The template is finished and tested. It is not on sale yet; this page will say where to get it when it is.

Coming soon

Not published on its store yet, so there is no buy or download link. PN Scripts does not take payment for it here.

Questions

Make and sell any number of your own games from it, and build games for clients. You may not resell or share the source code itself (PN Scripts Template Licence 1.0).

Any static web server to run the game, and some JavaScript. Node.js 22.12 or newer and Google Chrome run the smoke test.

No ad or portal SDK, and English only. It is tested in desktop Chrome and a phone-sized Chrome viewport with touch, not yet on iOS Safari, Firefox or a real phone.

The code was written with AI assistance and checked by PN Scripts with automated tests. All visuals and sounds are generated by code; there are no AI-generated image or audio files.

It is not on sale yet. When it is, this page will link to the store; PN Scripts does not take payment on this site.