You will get a polished 2D gameplay prototype in Unity, ready for testing and iteration
Top Rated
Top Rated
Project details
I build clean, structured 2D gameplay prototypes in Unity to help turn your idea into something playable and testable.
The goal is not to rush a full game, but to create a solid gameplay foundation you can iterate on and build upon.
We will focus on your core mechanic first — how the game feels to play — then refine it into a clear and functional prototype.
This is ideal if you want to:
validate a game idea
create a prototype for pitching or testing
start a project with a clean and scalable base
I mainly work on action, platformer and system-driven gameplay, with a focus on responsiveness and clarity.
The goal is not to rush a full game, but to create a solid gameplay foundation you can iterate on and build upon.
We will focus on your core mechanic first — how the game feels to play — then refine it into a clear and functional prototype.
This is ideal if you want to:
validate a game idea
create a prototype for pitching or testing
start a project with a clean and scalable base
I mainly work on action, platformer and system-driven gameplay, with a focus on responsiveness and clarity.
Game Type
2DGame Engine
UnityPlatform Type
PC, Mobile DeviceGenre
Action, Shooter, PlatformersPlugins
AnimationWhat's included
| Service Tiers |
Starter
$300
|
Standard
$800
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 7 days | 15 days | 45 days |
Number of Revisions | 1 | 3 | 5 |
Design | - | ||
Source Code | |||
Animation | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$60 - $280
Additional Revision
+$40
Additional Gameplay Feature
(+ 3 Days)
+$150
UI & Game Feel Polish
(+ 3 Days)
+$140
Mobile Build Setup
(+ 2 Days)
+$100Frequently asked questions
62 reviews
(52)
(9)
(1)
(0)
(0)
This project doesn't have any reviews.
AG
Adam G.
Jun 22, 2026
Nimble Strong Update
Amazing job as usual!
SG
Shuo G.
Apr 29, 2026
Unity 2D Prototype Session (Trail/Initial)
CT
Clint T.
Apr 4, 2026
Local AI Sandbox Testing Lipsync Audio Input Standalone
Very kind, professional to work with. Thank you!
SS
Spencer S.
Mar 26, 2026
Android Unity Engineering Update for Compliance
Guillaume did an excellent job fixing a Unity Android compliance issue for me. He was knowledgeable, efficient, and quick to identify the problem and implement the right solution. Communication was clear throughout, and he handled the technical work with confidence and professionalism. I really appreciated how smoothly he moved the project forward and got it resolved efficiently, saving our team precious time. I’d gladly work with Guillaume again and would highly recommend him for Unity and Android engineering work.
JM
James M.
Jan 28, 2026
Mobile Game Developer Needed for Cute 2D Tapping Game (BooTap) – iOS & Android
Great experience overall. Clear communication, reliable delivery, and solid technical work. Would happily work together again.
About Guillaume
Unity Game Developer | Gameplay & Production Systems
100%
Job Success
Naha, Japan - 5:28 am local time
My main focus is Unity development: gameplay programming, UI-driven game loops, mobile/WebGL builds, scoring systems, progression, player interactions, content workflows, and production features.
I work especially well on projects that need more than just code implementation: I can help structure the gameplay flow, identify missing requirements, improve usability, and make sure the system is practical to maintain after delivery.
What I can help with:
• Gameplay systems, interactions, and core game loops
• Playable prototypes, MVPs, and vertical slices
• Improving or completing existing Unity projects
• UI, menus, scoring, timers, progression, feedback, and game flow
• Mobile, WebGL, desktop, and browser builds
• Data-driven content using JSON/CSV
• Custom tools to make content easier to update
• Bug fixing, polish, project cleanup, and stability improvements
• External service/API integration when needed
I also have experience with Unreal Engine 5, Godot 4, Construct 3, Blender, Git, and general production workflows, so I can communicate well across technical, design, and asset-related parts of a project.
My Upwork history includes shipped mobile games, Unity ports, long-term production work, WebGL builds, prototypes, gameplay systems, and production support across desktop, mobile, and browser platforms.
I work best with clients who want a practical developer who can think through both the technical implementation and the game design direction.
Steps for completing your project
After purchasing the project, send requirements so Guillaume can start the project.
Delivery time starts when Guillaume receives requirements from you.
Guillaume works on your project following the steps below.
Revisions may occur after the delivery date.
Gather Requirements
We define your game idea and create a simple gameplay document to guide the prototype.
Prototype first draft
A first playable prototype is built, focusing on the core gameplay and controls.