Transforming a vibe-coded prototype into a reliable sales, inventory, and event-management system for artist-alley vendors.
description.
ROLE - Product Designer / UX Designer / AI-Assisted Prototyper
DURATION - 1 month
TOOLS - Unity, Shader Graph, Blender
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RESPONSIBILITIES
UX audit and pain-point identification
Product requirements and feature prioritization
Information architecture
Interaction and interface design
Rapid prototyping through Codex
Iterative QA and usability review
Field research planning and testing
UX audit
Revised IA/flows
Rapid Iteration
Field testing
Visual-system Refinement
In a fast paced, multi-entity management game, how can players understand what actions are available, where they apply, and what their outcomes will be—without relying on heavy UI?
Problems identified through stakeholder interview and product review.
PAIN POINT 1
Slow checkout workflow
The primary user needed to record sales quickly during busy convention periods, but frequent actions required too many steps.
PAIN POINT 2
Difficult inventory management
Products, stock changes, and sales records were not organized into a clear and scalable workflow.
PAIN POINT 3
Limited event oversight
The original system lacked a reliable way to separate current events, past orders, inventory activity, and performance summaries.
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Event
The prototype was deployed at a 4-day illustration convention - The Seoul Illustration Fair V.21 (SIF v.21) that took place from July 30 to August 2, 2026, at COEX Hall C in Seoul.
Primary user
The product’s original creator and an independent artist with prior artist-alley experience.
Duration: 4 days
Environment: Live artist-alley booth
Participant: 1 primary user
Methods: Observation, field notes, system records, and post-event interview
Through field observation, system records, and a post-event interview, I identified usability and reliability issues to prioritize for the next iteration.
Data inconsistencies reduced trust
Repeated currency, promotion, and logging inconsistencies reduced confidence in the accuracy of sales records.
EVIDENCE
Currency display was inconsistent. e.g Some values were displayed as non-whole numbers.
Default promotion rules reappeared after deletion.
Price changes were not logged.
IMPACT
In a live sales environment, inaccurate prices or records could affect transactions, inventory, and end-of-day reporting. User had to manually reset some of the price values.
DESIGN DIRECTION
Store prices in the selected event currency.
Apply consistent currency formatting.
fix promotion persistence.
Log all price changes.
Inventory editing was too far from the item
When the user needed to change one product, they expected to edit it directly but instead had to scroll up and enter batch-edit mode. Scenario comes up especially when there is a need to adjust price.
A cropped screenshot with an arrow showing the distance between the product and editing controls
IMPACT
Small corrections became slower than necessary during active event operations.
DESIGN DIRECTION
Add direct per-product editing.
Keep batch editing for larger updates.
Reduce scrolling and context switching.
Navigation did not reflect actual usage
The user initially hesitated when navigating between Register, Inventory, and Events because the grouping did not match their expected workflow.
EVIDENCE
Inventory was accessed much more frequently than Events as there are constant occation where price has to be adjusted.
The current event was not automatically surfaced.
The user needed time to understand the relationship between sections.
IMPACT
High-frequency actions required unnecessary navigation decisions during live selling.
DESIGN DIRECTION
Prioritize Register and Inventory, clarify the relationship between operational and administrative tabs, and automatically surface the active event.
WHAT WORKED
Category navigation supported fast product selection
The use of product categories for quick access.
EVIDENCE
The user frequently relied on category filters to locate products quickly during live transactions.
VALUE
The interaction reduced searching and supported quicker checkout.
DESIGN DIRECTION
Preserve the category-first browsing structure and keep categories easily accessible in the Register. Instead of common emojis, considering designing visually recognizable icons.
phone.
(917) 306 5513
email.
hiulamhilaryc@gmail.com
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