Opus 5.5 — generalDifficulty: IntermediateProduction path: Coding & simulation

Mobile Game UI Highlight VFX (Chest, Tier-Up, Boss Loot)

Generate canvas/WebGL-ready particle bursts, screen flash, shake, and rarity color ramps for gacha-style reward moments at 60fps on mid-tier phones.

Prompt

90 words · 656 characters
Create a single HTML demo showcasing three mobile-game reward VFX presets: CHEST_OPEN, TIER_UP, BOSS_LOOT.

Tech: Canvas 2D or lightweight WebGL; no game engine.
Each preset includes:
- 0.0–2.0s timeline with labeled phases (anticipation, peak, settle).
- Particle emitter params (count, spread, gravity, drag, color over life).
- UI mock: centered card, rarity border (common/rare/epic/legendary hex colors).
- Screen shake envelope ( amplitude vs time ) and optional radial blur fake via scaled overlays.
- Performance budget comment: max draw calls, particle cap for 720p@60.

Export functions: playPreset(name), resetScene(). Use requestAnimationFrame.

Workflow notes

Record with OBS at device DPI; compare frame pacing in Chrome Performance tab. awesome-opus corpus tags many game demos as motion/UI or 3D—verify creator disclosed Opus authored the code.

  • Opus 5.5 — generalFeaturedAdvanced

    Interactive Transformer Architecture Explainer

    Build a scroll-driven, canvas-based walkthrough of self-attention, multi-head attention, and feed-forward blocks with live tensor shapes and token highlighting.

    Coding & simulationtransformereducationcanvasinteractive
    View details
  • Opus 5.5 — generalAdvanced

    Deep Refactoring with Invariant Analysis

    Opus 5.5 reasoning prompt to extract loop invariants, pre/post conditions, and safe refactor steps before touching production payment or credit code.

    Coding & simulationrefactoringreasoninginvariantsformal-methods
    View details
  • Opus 5.5 — generalFeaturedIntermediate

    World-Class Motion Designer System Prompt

    A reusable system prompt that encodes easing curves, staging, 12 principles of animation, beat-sync rules, and deliverable specs for UI and brand motion.

    System promptmotion-designeasingsystem-promptui
    View details

Build on Claude Fable5 with your eyes open

Know the Claude Fable5 cost math, the safeguard behavior, and the right tier before you commit. Create a free account to get notified when specs, prices, or access channels change.