How a 17-Year-Old Solo Founder Built an AI Platform for Game Devs and Hit $100K ARR in 6 Weeks

Hello! Who are you and what business did you start?

Hey, I'm Giulio. I'm a 17-year-old solo founder and developer. I built ForgeGUI, a purpose-built AI design studio tailored exclusively for game developers.

If you are building games on platforms like Roblox, UEFN (Fortnite Creative), Minecraft, Unity, or Unreal, you need a massive amount of UI/UX assets. I'm talking about thumbnails, HUD elements, health bars, skill icons, inventory screens, and even classic clothing for Roblox avatars.

Instead of spending hours manually designing these in Photoshop, paying hundreds of dollars to freelancers, or settling for generic placeholders, ForgeGUI allows developers to generate game-ready assets in under 30 seconds—with absolutely zero design experience required.

I launched the platform on March 12, 2026. Roughly six weeks later, we crossed $100K in Annual Recurring Revenue (ARR) and scaled to over 20,000 users.

What's your backstory and how did you come up with the idea?

The idea came from observing a massive, bleeding-neck pain point in the indie game dev community.

Game developers are usually highly technical, but many lack visual design skills or the budget to hire a dedicated UI/UX artist. Time spent wrestling with Figma or waiting on freelance asset deliveries is time stolen from core gameplay programming and iteration.

While generative AI tools like Midjourney or Leonardo already existed, they had a fatal flaw for game devs: they weren't game-native. They output beautiful, generic art, but struggle immensely with UI consistency, transparent backgrounds, or specific aesthetics like "chunky Roblox frames" or "pixel-style inventory slots."

I realized that if I could build an AI tool that deeply understood game aesthetics—and allowed devs to generate cohesive, matching UI sets—it would save them 40+ hours per project and completely change their workflow.

Take us through the process of designing and building the MVP.

Because I was targeting a younger, fast-moving demographic, the product had to feel like magic, but also be highly practical. A cool image isn't enough; they needed assets they could immediately drop into their game engines.

I built the entire workflow directly in the browser:

1. Style Locking: Users can upload a reference screenshot (like an existing UI) to lock in colors, borders, and overall aesthetic, or choose from our presets (anime, cartoony, realistic, etc.).

2. Prompting: They just type what they need: "Create a dark fantasy shop UI with wooden frames and glowing buttons."

3. Generation & In-Browser Editing: The assets generate in 10–30 seconds. But critically, we allow them to edit layers, reorder elements, and add text right in the browser.

4. Export: Everything exports as PNGs with transparent backgrounds.

To make this work as a solo founder, I had to rely heavily on advanced image generation models that were fine-tuned and heavily prompted for game UI consistency. Using reference-guided style transfer was the absolute key to making sure a health bar visually matched an inventory screen.

I didn't waste time trying to make it perfect in a vacuum. I shipped the MVP fast on March 12 and committed to rapid, visible iterations.

Describe the process of launching the business.

I didn't have a massive marketing budget. My launch strategy relied entirely on building in public and leaning into existing, highly active communities.

I started posting consistently on X (Twitter) as @im_the_giulio and via the product account @forgeguiai. I shared everything:

• The exact MRR numbers as they climbed.

• The user growth metrics.

• "Insane" visual results and demos that sparked immediate virality.

I also joined Founders Inc (@fdotinc) and their Canopy '26 program, which provided a massive boost in network visibility and foundational support.

But the real gasoline on the fire was the game dev community itself. Roblox and UEFN developers talk constantly. When one dev realized they could generate a $300 custom UI set for pennies in 30 seconds, they told everyone.

Since launch, what has worked to attract and retain customers?

Hitting 25K+ users in a month requires more than just a few good tweets. Here are the core distribution and retention levers that drove our growth:

1. Organic Creator Virality (YouTube & Instagram):
Because the product is highly visual and solves a desperate need, gaming YouTubers and Instagram creators picked it up organically. Videos titled "This AI Makes INSANE Roblox GUIs!" started acting as a massive, free acquisition funnel. We didn't run heavy paid ads; the product demo was the viral content.

2. Product-Led Growth via "Remixes":
I built a community feature directly into the platform called Remixes. Users can share, like, and remix other developers' creations. The top remixes earn free credits weekly. This created a sticky, social loop inside the app—people weren't just coming to generate; they were coming for inspiration.

3. Relentless Shipping Velocity:
When you are a solo founder, your biggest advantage against incumbents is speed. In the first few weeks, I pushed aesthetic updates, improved models, added clothing generation for Roblox, UEFN support, and thumbnail generators. Users stuck around because the product got noticeably better every single week.

Let's talk revenue. How does the business model work?

We operate on a Freemium model with a usage-based credit system.

Getting young game developers to pull out a credit card upfront is tough. We offer a "free forever" plan that is generous enough for them to test the magic. Once they see the value, they buy credit top-ups or subscriptions.

For example, thumbnails might cost 4 credits, while a GUI asset might cost 3-5 credits (with bulk discounts). This usage-based model is brilliant because it scales perfectly with our power users—studios or devs iterating heavily will naturally pay more as they consume more compute.

The MRR Ramp was explosive:

Within weeks, we hit $5.6K MRR.

That quickly jumped to $6.4K, then $7.1K, then $7.8K in rapid daily/weekly increments.

Around the 6-week mark, we officially crossed the $100K ARR milestone (over $8.3K+ MRR).

The value proposition makes the sale easy: Pay a few dollars for credits, and save 40+ hours and hundreds of dollars on freelance artists.

Through starting the business, have you learned anything particularly helpful or advantageous?

1. Niche down until it hurts. ForgeGUI isn't "another AI image generation tool." It is "the AI design suite built for game devs." General tools lose out to highly specific tools that understand a user's exact workflow (like exporting transparent PNGs or applying chunky Roblox frames).

2. Solve a sharp pain in a loud community.
Roblox, Minecraft, and UEFN devs are incredibly passionate and vocal. If you build something that genuinely removes friction from their day, they will become your marketing department.

3. Build in public with proof.

Tweeting "I built an AI tool" gets zero traction. Tweeting "We just hit $7.8K MRR in 5 weeks, here is exactly how our thumbnail generator works" builds massive credibility and FOMO.

Advice for other entrepreneurs who want to get started?

Make it magical but practical. Hype only lasts for a day. If your AI tool doesn't seamlessly integrate into someone's actual workflow—if they can't drop the asset right into their engine and keep working—they will churn.

Ship fast, listen, and iterate visibly.

At 17, I didn't have a team of senior engineers. I just shipped the core functionality, listened to what the devs were screaming for, and built it the next day. High agency and product intuition will beat broad ambition every time.

If you're a game dev, try it at forgegui.com.