From an empty baseplate to an "impossible" neon level, one sentence at a time
Disclosure: I'm in ForgeGUI's creator partner program and get paid for content about it. Everything below comes from real footage of the build.
"Geometry Dash in Roblox" is one of those ideas every Roblox player has had at some point: a glowing cube, spikes, jump pads, gravity flips, and a level that keeps getting harder. Building it yourself normally means scripting movement, collisions, respawns and a whole level by hand.
I built one with six typed prompts using ForgeGUI, an AI tool with a Roblox Studio plugin that puts what it generates straight into your place. Here's every prompt, in order, and what each one added.
Prompt 1: The level itself
Prompt: "Build a geometry dash level"
I started on a plain baseplate with a default character. One prompt turned it into a Geometry Dash-style runner: a dark world with neon cyan and purple platforms and a glowing cube as the player.
It also added a small on-screen HUD in the corner with "RUN / JUMP / REPEAT", an attempt counter and a section counter. That's the detail that made it feel like actual Geometry Dash instead of "a cube on a platform".
Prompt 2: Something to jump over
Prompt: "Let me jump over spikes"
Spikes are the core of the genre. Notice the wording again: I described what the player does ("let me jump over"), not how to code a hazard. The result was glowing pink spikes on the track that you have to time your jumps over.
Prompt 3: Jump pads and orbs
Prompt: "Add jump pads and orbs"
This is where it starts to play like the real game. Yellow jump pads on the floor launch the cube, and floating yellow orbs give you something to hit mid-air.
Prompt 4: Flip the gravity
Prompt: "Make gravity flip"
Gravity flips are the moment Geometry Dash levels go from "fine" to "wait, what". After this prompt the cube flips toward the ceiling, and the level gets hazards on the top as well as the bottom. Glowing pillar sections also started showing up in the level.
Prompt 5: Make it insane
Prompt: "Make the level insane"
Once the mechanics exist, a "vibe" prompt lets the AI decide how to escalate them. "Insane" meant more spikes in a row, tighter gaps and more going on at once.
Prompt 6: Make it impossible
Prompt: "Make the final level impossible"
The last prompt pushed it all the way: tall glowing yellow and purple pillars, spikes, orbs and moving shapes everywhere. You can see the attempt counter going up in the footage, which tells you how "impossible" went.
Why this order works
- Build the base first ("build a geometry dash level").
- Add one mechanic per prompt (spikes, then pads and orbs, then gravity).
- Only then use vibe prompts ("insane", "impossible").
If you start with "make an impossible geometry dash level", the AI has to guess everything at once. Going one step at a time also means that if something breaks, you know exactly which prompt caused it.
Ideas to take it further
- "Add a practice mode with checkpoints", the classic Geometry Dash feature
- "Add a progress bar at the top"
- "Add a ship section where I fly"
- "Make the level sync to music"
FAQ
Can you make Geometry Dash in Roblox without scripting?
Yes. In this build, the level, spikes, jump pads, orbs, gravity flip and attempt counter all came from typed prompts.
Is ForgeGUI free?
There's a free tier with starter credits for new accounts. Generations use credits after that.
Does it work inside Roblox Studio?
Yes, through ForgeGUI's Roblox Studio plugin.
Watch the 20-second version of this build on TikTok: @ash.robloxdev. Try it yourself at forgegui.com: open a fresh baseplate and type the prompts above in order.
Top comments (0)