We built a small browser game — a B2B SaaS tycoon called the SaaS Building Simulator — using nothing but HTML, CSS and a single JavaScript file. No framework. No build step. No stand-ups. We did it to make a point we make to clients all the time: plain, simple web technology can do far more than most people give it credit for.
▶ Play the SaaS Building Simulator
What’s the game?
You start with zero lines of code, zero customers and the unshakeable conviction that this time it’s different. You write code, post on Reddit to win your first customers, squash bugs before they churn, hire engineers and marketers, fiddle with pricing, and raise a Series A — all while your monthly recurring revenue, costs and cash on hand tick along in real time. Grow fast enough and you get acquired. Run out of cash and you discover what “runway” meant all along. Any resemblance to actual startups, living or pivoted, is entirely intentional.
Why this is impressive for “just HTML”
Everything in the game is driven by the same basic web building blocks every website already uses — no game engine, no heavy framework:
- Stats that update live as a simulation loop ticks every second
- A pricing slider that recalculates customer demand as you drag it — your simulated customers, like real ones, notice price rises immediately
- Tabs, modal windows and hover tooltips for instructions and stats
- Charts of your revenue, customers and headcount, drawn from your own playthrough
- A faux developer terminal that narrates your decisions back at you, deadpan
It’s the kind of thing people assume needs a downloaded app, a game engine or a six-person platform team. It needs none of them.
Why this matters for your business
The point isn’t the game — it’s what the game proves. That same simple toolkit can run genuinely useful things for your business: an interactive cost calculator for your customers, a pricing or product configurator, a live dashboard for your team, or a small internal tool that finally retires the spreadsheet held together by hope and merged cells.
Because it’s plain HTML, it loads instantly, runs on any device, needs nothing installed, and costs almost nothing to host. You don’t need a big platform to give your customers something interactive — you need the right small thing, built well. That’s exactly the sort of software we build.
Common questions
What is the SaaS Building Simulator?
A small browser game where you grow a B2B SaaS company — write code, win customers, fix bugs, hire a team, set pricing and raise funding — before you go bankrupt or get acquired. It runs entirely in your browser.
Is it really built with just HTML?
Yes — one HTML file, some CSS and a single JavaScript file, with no framework and no build step.
Do interactive tools like this need an app or a server?
No. A static HTML page runs in any browser with nothing to install, loads fast and costs very little to host.
Can imci build an interactive tool for my business?
Yes. The same approach can power calculators, configurators, dashboards and internal tools tailored to your business.