Enhance Echo Blast Monetization

I’ve taken Echo Blast from concept to a fully-playable, neon-soaked arcade shooter that already runs smoothly in the browser and on mobile. The core loop, enemy waves, bouncing “echo bullet” mechanic, combo scoring and cyber-punk UI are all in place; what isn’t firing on all cylinders yet is the monetization layer.

I want an experienced game-economy designer / developer to rethink and rebuild the entire system—coins, gems, cosmetic skins, weapon unlocks, reward schedules and progression hooks—so players feel a constant, fair pull to keep playing and spending without breaking game balance or fun.

Current stack & context
• Built with modern web tech and AI-assisted tools (TypeScript, WebGL canvas, service-worker offline support).
• All shop screens, currency placeholders and event triggers already exist but are basic.
• Analytics hooks are available for A/B testing and retention tracking.

What I need from you
• A data-driven virtual economy design (currencies, prices, sinks, soft-/hard-currency flow).
• Revision of coin & gem earning rates, drop tables and premium bundles.
• Engaging skin and weapon unlock paths tied to clear player goals.
• Daily/weekly reward systems, streak bonuses and time-limited events to encourage return sessions.
• Clean, modular code that plugs into my existing TypeScript project without rewrites.
• Documentation outlining formulas, balancing rationale and future tuning guidelines.

Acceptance criteria
1. Average session length and day-1/7 retention targets defined and reachable in test builds.
2. No pay-to-win imbalance: power-creep thresholds stay within agreed ranges.
3. Store UI fully functional on desktop and mobile, with graceful fallback when payments aren’t available.
4. All new features covered by basic unit tests and a short integration walkthrough.

To be considered, please share past work that shows you’ve improved or built monetization systems in live or launched games—links, screenshots or brief case studies are perfect. I’ll shortlist based on demonstrated results, then supply a playable build and repo access for a quick technical review.

Let’s make Echo Blast both thrilling and sustainable.