How to Make a Platformer Game with AI (Full Build Guide, 2026)

Everyone has played a platformer, which is exactly why making a good one is harder than it looks. Run, jump, reach the goal sounds simple, but the difference between a platformer that feels great and one that feels off comes down to a handful of invisible mechanics most players never consciously notice. This guide shows you how to build a real platformer with AI by recreating those mechanics one at a time, in the order that actually works.

The big shift with an AI-native engine is what gets slow. In a traditional engine, the player controller and physics tuning eat your first few days. With AI, you describe each mechanic in plain English and it writes real GDScript, so that slow part becomes a conversation. What stays hard, and what this guide spends most of its time on, is feel: knowing which mechanics to ask for and how to tune them until the game is fun.

What a platformer actually is, mechanically

Before you prompt anything, it helps to see a platformer as a stack of systems, not a single thing. Recreating any platformer means recreating these layers:

1. A player that moves and jumps with weight and responsiveness
2. Jump assists that make controls feel fair (the secret sauce)
3. Platforms: static, moving, one-way, and crumbling
4. Hazards that punish mistakes (spikes, pits, saws)
5. Collectibles and a score or progress system
6. Enemies with simple, readable behavior
7. A camera that follows without snapping or lagging
8. Levels, checkpoints, and a goal
9. Menus, UI, and sound

The mistake almost everyone makes, with AI or without it, is trying to build all nine at once. A prompt like "make a full platformer with enemies, three levels, a shop, and a boss" gives you a shaky version of everything and a player controller you cannot tune. Build the layers in order. Each one is playable on its own, so you catch problems while they are still small.

Step 1: Pick the right template

Open Summer Engine, create a new project, and choose a platformer template. Starting from a template means the player controller, physics, and tilemap setup already exist, so your first prompt iterates on a working game instead of an empty scene.

Template	Feel	Reference
2D Platformer	Classic side-scroller	Mario, Sonic
Precision Platformer	Tight, hard, fast	Celeste, Super Meat Boy
Metroidvania	Interconnected, ability-gated	Hollow Knight, Ori
3D Platformer	Third-person 3D	Crash Bandicoot, A Hat in Time

For this guide, start with 2D Platformer. Everything here applies to the others; the precision and metroidvania templates just start with more assists or more world structure already wired in.

Step 2: Get the player moving, then stop

Your first prompt should do one thing: a controllable character that runs and jumps. Resist the urge to add anything else yet.

Make the player a small character that can run left and right and jump. Run speed around 200, jump that clears about three tiles. Nothing else yet, I want to tune the movement first.

Hit play. You now have the single most important part of the game, and everything you add later will be judged against how this feels. Walk around. Jump on the spot. Notice whether the character feels heavy or floaty, snappy or sluggish. You are not adding features right now; you are forming an opinion.

Step 3: Make the jump feel good (the part that matters most)

Here is the thing pros know and beginners miss: a good jump is not one value. It is a stack of small assists that work together, and almost none of them are visible to the player. They just feel right. This is where AI is genuinely powerful, because it can add all of them in a single prompt, but only if you know to ask.

Improve the jump feel. Add coyote time (about 0.1 seconds of grace after walking off an edge), jump buffering (if I press jump just before landing, it still jumps), variable jump height (tap for a short hop, hold for a full jump), and make gravity stronger when falling than when rising so the character has weight.

Each of those does something specific:

• Coyote time lets you jump for a split second after leaving a ledge, so missed jumps feel like your fault less often.
• Jump buffering registers a jump you pressed a few frames early, so landing and immediately jumping again works.
• Variable jump height gives you a short hop on a tap and a full jump on a hold, which is most of why Mario feels expressive.
• Asymmetric gravity (fall faster than you rise) is the single biggest fix for a floaty jump.

Play it again. It should immediately feel more responsive, even though nothing about the level changed. If it still feels off, tune one number at a time and playtest after each change. Tuning all of them at once hides which one actually mattered.

The jump still feels a bit floaty. Increase fall gravity by 30 percent and lower the jump height slightly.

This back-and-forth is the real work of platformer design. With AI it takes minutes instead of a recompile every time, but the judgment is still yours.

Step 4: Build the level vocabulary

Now that movement feels good, give the player things to jump on and avoid. Add platform types one prompt at a time so you can see each one work.

Add three platform types: solid static platforms, horizontal moving platforms that carry the player, and crumbling platforms that fall a moment after I land on them.

Then hazards:

Add spikes that reset the player to the start of the level on contact, and bottomless pits that do the same. Make the reset instant with no death animation, so retrying is fast.

Instant respawn is a deliberate design choice, not a shortcut. In precision platformers, the speed of retrying is a feature; it keeps you in flow. If you are building something gentler, ask for a checkpoint system instead:

Add checkpoints. When I touch a checkpoint flag, respawn there instead of the start.

Step 5: Add the camera (do not skip this)

A tight player controller feels bad behind a bad camera. This is the most commonly skipped step and the one that quietly ruins feel.

Make the camera follow the player smoothly with a small amount of look-ahead in the direction I am moving. Do not let it snap, and keep it from showing outside the level bounds.

Smoothing stops the jitter, look-ahead shows you where you are going so jumps read better, and bounds clamping stops the camera from revealing empty space at the edges. Play it and move fast in both directions; the camera should feel calm, not reactive.

Step 6: Collectibles, enemies, and a goal

Now the platformer becomes a game with a point. Keep each addition small and readable.

Add coins scattered through the level with a pickup sound and a counter in the top corner. Add a patrolling enemy that walks back and forth on a platform and resets the player if touched. Add a flag at the end of the level that loads the next level.

Readable enemy behavior beats clever enemy behavior in a platformer. A patrol you can see and time is more fun than an AI you cannot predict. If you want stomp mechanics:

Let the player defeat the patrolling enemy by jumping on top of it, with a small bounce afterward. Touching it from the side still resets me.

Step 7: Levels, menus, and polish

With one solid level, ask the AI to expand. Difficulty in platformers comes from introducing one new idea at a time, not from cramming everything into level one.

Add two more levels that get harder. Level two introduces moving platforms over pits. Level three adds spikes on the ceiling and tighter jumps. Carry my coin count between levels.

Then the frame around the game:

Add a start screen with a play button, a game over screen with a retry button, and a level complete screen showing coins collected. Add background music and a jump sound effect.

When to drop into the editor

You can build this whole game in chat, but platformers are physics-heavy, and sometimes you want to nudge a single number without a round trip. Everything the AI built is standard Godot: scenes, scripts, and resources, nothing locked or hidden. Open the player script and change gravity or jump_velocity directly. Paint level tiles by hand in the tilemap editor when you want a specific layout the AI would take five prompts to describe. Drag in your own sprite art.

This is the line between an AI game maker and an AI game engine. A browser AI maker gives you a result you cannot open; ask for a wall jump and it regenerates the whole game. An AI-native engine gives you a project you can inspect and edit at every level, so chat and manual editing become two tools for the same job. Use conversation for speed, use the editor for precision.

Going further: turning your platformer into a metroidvania

Once the platforming feels solid, a metroidvania is a natural next step, and the order still matters. A metroidvania is a platformer plus abilities plus a map that gates progress behind those abilities. Build it that way:

Add a wall jump ability, but lock it behind an item I have to find. Add a locked area I can only reach after I have the wall jump.

Then a dash, then a double jump, each one opening areas that were unreachable before. Build the abilities and the locks together, one pair at a time. Trying to design the whole interconnected world up front produces a tangle nobody can tune.

Export your platformer

When it plays well, export it like any Godot project, because that is what it is.

• Desktop (Steam, itch.io): File, Export, Windows / macOS / Linux, then build and upload.
• Web: File, Export, HTML5, then host or share the link.
• Mobile: File, Export, Android / iOS, then submit to the stores.

Export works because Summer Engine is compatible with Godot 4. Standard process, standard output, a native game and not a browser demo.

What is free and what is not

Summer Engine is free to download, and the free tier covers everything in this guide: building the game, the full editor, and export to Steam, web, and mobile, with no watermark and no revenue share. You only pay if you want more AI usage on larger projects, which mostly matters once you are iterating on big games for hours a day. For a first platformer, the free tier is the whole journey.

Browser AI game makers are also free to try and genuinely fun for a quick demo. The honest difference is ownership: they keep your game in the browser, hide the code, and make you regenerate instead of edit. If you want a platformer you can tune, expand, and publish, build it in a project you actually own.

The best way to learn all of this is to start. Pick the 2D platformer template, get the player running, and spend ten minutes making the jump feel good before you add anything else. That ten minutes teaches you more about platformer design than any guide can.

Start with Summer Engine | Platformer Templates | Download Summer Engine