Upwork Proposal Generator for React Developers

The reason a prototype like this feels "off" is almost never the visuals. It's that dialogue gets cut off mid-line, a hotspot fires while a scene transition is still animating, or audio drifts out of sync after a few minutes of runtime. The moment you treat this like a page-based app instead of a runtime with a single source of truth for time, everything downstream breaks. That non-interruptible narration rule you mentioned is the giveaway that this needs an event queue and a state machine, not more useEffects.

The decision that made the difference on my last real-time build: I stopped syncing components to React state and instead ran a central sequencer that owned the timeline, with React only rendering what the sequencer said was true. State-driven media playback is where drift and race conditions live. Once one clock controls video, audio triggers, and transitions, "dialogue must not be interrupted" becomes a locked state, not a bug you chase.

Relevant proof, since this is systems work more than UI work:

RealTalkReferee (app.realtalkreferee.ai): live SaaS handling real-time conversation analysis and event-driven flows for paying users, the same sequencing discipline your narration and hotspots need.

StockMarketScan (stockmarketscan.com): production app coordinating many simultaneous data events without collisions, close to your "multiple events at once must be controlled" requirement.

How I'd approach Phase 1:
1. Read your developer guide first, then map the existing interaction framework before touching a line, so I extend your system instead of fighting it.
2. Build a central sequencer that owns playback time, with an event queue that gates hotspots and transitions.
3. Lock narration as an uninterruptible state, queuing any competing events until dialogue completes.
4. Ship one polished Velion world with lip-sync timing verified, then stress-test sync across a full runtime session.

Is the current sync issue mostly audio drifting from video over time, or interactions firing during scenes that should block them?