Scope First, Code Later: Our Solo Dev Prototyping Hack

Posted by Gemma Ellison

July 27, 2025

Prototyping is crucial, but it’s easy to fall into the trap of coding first and asking questions later. As a solo dev, that approach is a recipe for scope creep and wasted effort.

Scope First, Code Later: Our Solo Dev Prototyping Hack

My most successful projects weren’t born from lines of carefully crafted code initially.

They began with a relentless focus on defining scope.

Most of us indie devs struggle with the “shiny object syndrome.” We see a cool mechanic, implement it, then realize it doesn’t fit the core loop. Days, maybe weeks, wasted. This hack helps you avoid that.

The key is a simple, repeatable prototyping process that prioritizes scope definition above all else.

Identifying Core Mechanics

Start by defining the single, most essential thing your game must do to be considered “fun.”

What’s the core interaction loop? Is it shooting, building, puzzle-solving, or something else? Strip everything else away in your mind.

For example, if you’re making a platformer, is the core mechanic precise jumping, momentum-based movement, or something unique?

Let’s say you want to create a rogue-like dungeon crawler. The core mechanics are simple: move, attack, receive damage, die, and maybe some very basic item pick-up.

Avoid the temptation to add inventory systems, crafting, multiple enemy types, or complex skills at this stage. They’ll come later if the core feels good.

Setting Strict Boundaries

This is where most developers fail. We tend to think, “It would be cool if…” and suddenly the project is three times larger. Resist that urge.

The initial prototype should only include what’s absolutely necessary to validate the core mechanic.

What is the minimum viable feature set?

Continuing with the dungeon crawler example, your boundaries might be:

One playable character.
One enemy type.
One procedurally generated level that is extremely simple.
Basic melee combat.
Very basic health and damage numbers.
Game Over screen.

Don’t even think about adding ranged combat, multiple characters, or skill trees until you’ve proven the base loop is engaging.

The No-Code/Low-Code Prototype

Here’s where you actually build something. Crucially, you do not need to write any complex code. This is about validation, not optimization or polish.

Use readily available, no-code or low-code tools.

GameMaker’s visual scripting, Unity’s Bolt, or even just simple level editors can do wonders.

For the dungeon crawler prototype, you might use placeholder assets from asset stores or even just colored blocks. The graphics don’t matter. What matters is how the game feels.

Focus on getting the core loop functional and playable as quickly as possible. Implement the movement, attacks, and enemy behavior. Create that minimal level and test it.

If you can’t make a basic prototype in a few days, your scope is likely still too big.

I once spent two weeks building a complex inventory system for a game where the core combat wasn’t fun. Huge mistake.

Validating the Core Loop

Playtest, playtest, playtest. This is the most important step.

Does the core mechanic feel fun? Is it engaging? Is it even feasible given your skills and resources?

If it’s not fun, you’ve just saved yourself weeks or months of wasted effort. Iterate on the core mechanic. Tweak the movement speed, damage values, or enemy AI.

If it is fun, congratulations! You’ve validated the core loop and can move on to expanding the game’s features.

But even now, be ruthless about scope. Add features incrementally and validate them each time.

Common Mistakes and How to Avoid Them

Scope Creep During Prototyping: This is the biggest killer. Write down your scope and stick to it. If you get an idea for a new feature, write it down for later, but don’t implement it until the core loop is validated.
Over-Polishing the Prototype: Don’t waste time on art, sound, or UI at this stage. Focus on the core mechanics. A polished turd is still a turd.
Ignoring Playtester Feedback: Get your prototype in front of other people and listen to their feedback. Don’t get defensive. They’re telling you what’s working and what’s not.
Using the Wrong Tools: Don’t try to build a complex game engine from scratch for a prototype. Use existing tools that will allow you to iterate quickly.

Case Study: From Flop to Hit

I spent a month working on a top-down shooter that just wasn’t fun. The core mechanic of shooting just didn’t feel satisfying. I wanted to add a bunch of other features, like a skill tree, different weapons, and procedurally generated levels.

But, I stopped myself. I scrapped all the code, started over, and focused solely on making the shooting feel good. I used simple circles and squares for graphics, but I spent hours tweaking the bullet speed, spread, and impact effects.

Eventually, I nailed it. The shooting felt punchy and satisfying.

I then added the other features incrementally, always validating each one before moving on. The game went from a potential flop to a small success, all because I prioritized scope and validated the core loop first.

The Takeaway

Solo dev is tough.

Time is your most valuable resource. Don’t waste it on features that don’t matter.

Define your scope. Prototype your core mechanic. Validate it. Only then should you start building the rest of your game. This simple hack can save you countless hours and help you create games that are actually fun.