Token Furnace: Paste Your Code, Meet the Intern, Get Roasted

I’ve built a lot of actual games lately: this one is more of a joke that got out of hand. It’s called Token Furnace, and the whole premise is this: you paste in some code, and a sweaty little intern in a shirt that says BILLABLE shovels every single token into a furnace while you watch the bill climb. It’s a love letter to, and a gentle roast of, the way all of us think about AI tokens now. Like the rest of my stuff it’s completely free, runs right in your browser, and nothing you paste ever leaves your machine.

Here’s the bit: every chunk of your code is a token, and tokens cost money to burn. So you hand the intern your code, he frantically feeds it into the fire, the furnace roars in proportion to how much you gave him, and when the flames die down he prints you an itemized receipt: tokens incinerated, surcharges for your various sins, and a grand total, capped off with a letter grade from a glorious S all the way down to a smoldering F.

The fun part is that he has opinions. Messy code makes a bigger fire and a bigger bill, and he’ll itemize exactly why: the three-deep nested loops, the console.log you forgot to delete, the hardcoded API key (go rotate that one, by the way), the bare except:, the SELECT *. Hand him something short and tidy and you get the opposite reaction: the flame barely flickers and he gets bored. Clean code is the high score here. Without meaning to, the whole thing quietly turns into a code-golf game.

My favorite touch: he reads your comments. Paste in real code and he’ll fish out your actual // TODO: clean this up before the demo and your // not sure why this works but it does and roast them one at a time. He has seen a great many // HACKs in his time. He is not impressed by yours.

Around all of that there’s a running ledger that tracks your lifetime tokens burned and the ash pile slowly growing at the base of the furnace, a wall of achievements to unlock, a defend your code button for when you disagree with the verdict (he always has a comeback), and a one-click share card for when you’re proud of, or horrified by, your grade. Feed it a truly enormous file and the furnace will straight-up explode.

Since launch I’ve kept piling on. Your roast is now delivered by one of a rotating cast of clerks: the eager intern, a buzzword-fluent Architect, a tenured-and-tired Staff Engineer, and a Scrum Master who will turn your bug into seven tickets, and if you don’t like the verdict you can hit second opinion and let a different one have a go at it. There’s a Daily Challenge too: everyone gets the same cursed snippet each day, so you can compare grades. And your most catastrophic pastes now earn a permanent spot in the Hall of Shame.

And to be completely clear, because people always ask: this is all just regex and vibes running in your own browser. Your code is never uploaded, never stored, and never sent anywhere. The intern genuinely cannot afford a server.

It’s a silly thing, but I had a blast building it, and I think anyone who writes code for a living will recognize a few of these line items a little too well. Paste in your worst file and see what grade you get. If there’s a roast the intern should be making and isn’t, I’d love to hear it: drop a comment or use the contact form. And if you want to see the rest of what I’ve been building, it’s all collected over in the arcade. Thanks, and sorry in advance about your grade.

What Am I Actually Looking At?

If you don’t live in the world of AI and “tokens,” here’s the whole joke in plain English: it takes about ten seconds to get.

• What’s a token? When you send text or code to an AI, it gets chopped into little pieces called tokens (roughly a few characters each) and you’re billed by how many you use. More code means more tokens means a bigger bill. This game makes that feeling very, very literal.
• Paste something in. Drop any code into the box (a file you’re proud of, a config, that 800-line component you are decidedly not proud of) and hit Feed the Furnace. No code? There are sample buttons for messy code, clean code, and an outright disaster.
• Watch it burn. The intern shovels your tokens into the fire and the meter counts up your imaginary bill. The messier the code, the bigger the blaze.
• Read the receipt. When it’s done you get an itemized invoice of everything that cost you, a letter grade, and a verdict from the intern. Clean, short code scores high and bores him; sprawling, messy code earns an F and a roaring fire.
• It’s a roast, not a review. Nothing here is real analysis and nothing is uploaded: it’s a comedy toy that runs entirely on your own device. The goal is a laugh, not a code review. Take the grade in the spirit it’s given.

That’s the whole thing. Go feed the intern your worst work and see how badly you can make the furnace roar. Have fun!