Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Scribblenauts Unlimited
The award-winning, best-selling puzzle game franchise Scribblenauts is back! Imagine Anything. Explore Everything.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
2,308 ratings · Top 30%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Scribblenauts Unlimited: map the core Games workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Expand the object creation library to include more interactive elements.
Assumption to check: Limited object creation options can frustrate players
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more subtle way to encourage purchases without interrupting the flow.
Assumption to check: In-app purchase prompts can disrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a difficulty setting to cater to different player skill levels.
Assumption to check: Some puzzles are too easy or too difficult
Validate with people who use this workflow before building.
Hypothesis 4
Enhance QA testing processes to minimize bugs and improve the overall experience.
Assumption to check: Technical issues and bugs can affect gameplay experience
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
The award-winning, best-selling puzzle game franchise Scribblenauts is back! Imagine Anything. Explore Everything. Welcome to an adventure into a wide-open world, where the most powerful tool is still your imagination. Help Maxwell solve robust puzzles across dozens of seamless, free-roaming levels by summoning any object you can think of. Or you can apply adjectives to existing objects and magically transform their properties! Then learn the back-story about Maxwell's parents, 41 siblings (including his twin sister Lily), and how he got his magical notepad. Features • All-New Unbound World: Explore an open universe with unlimited hours of fun using every level as your playground. • Object Library: Store previously summoned objects and your own creations in Maxwell's Magic Backpack for easy access and future use. • Mobile optimized controls: Pinch-to-zoom and two-finger pan around enormous playgrounds. Interact and modify any object on screen. • Exclusive, new characters: Enjoy a time mashup with Hipster Lincoln or Robo-Einstein, become a Corporate Werewolf, or rule from above as Queen of the Skies!
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
Zustand
React Navigation
React Native Reanimated
BUILD KIT DIFFICULTY
Advanced
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
