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
Magic Level 9: Tap Piano Game
dive into a world of trending songs with magic level 9! this piano game features a stunning collection of trending songs, provide a relaxing and enjoyable music experience.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
31,564 ratings · Top 5%
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 included17 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 Magic Level 9: Tap Piano Game: 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
Offer more free tracks or rotate tracks daily to keep engagement high.
Assumption to check: Limited music tracks available for free users
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more user-friendly ad experience or offer an ad-free subscription.
Assumption to check: Ads can disrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchase flow and provide clear value propositions for items.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Introduce adjustable difficulty settings or gradual level progression.
Assumption to check: Game difficulty can escalate too quickly
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
dive into a world of trending songs with magic level 9! this piano game features a stunning collection of trending songs, provide a relaxing and enjoyable music experience. tap to the rhythm of your favorite songs and create beautiful music with ease. whether you're a seasoned pianist or just starting out, this game offers a fun and accessible way to play, unwind, and challenge yourself. beginner guide: - tap the black tiles. - hold the long tiles. - double tap for double tiles. - don't miss a beat: accuracy is key! avoid missing any tiles to maintain the rhythm. key features: - endless hit songs: discover a vast library of popular and trending songs, with new tracks added regularly. - relaxing gameplay: immerse yourself in a soothing piano experience, perfect for stress relief. - master the tiles: tap, hold, and double-tap black tiles to create captivating music. - challenge yourself: test your speed and accuracy with endless mode and upcoming pvp and offline challenges. - free to play: enjoy the game completely free with the option to unlock new songs effortlessly - unleash your inner musician and embark on a piano journey. download magic level 9 now and let the rhythm guide your music!
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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
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BUILD KIT DIFFICULTY
Expert
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.
