Hey everyone at Product Hunt 👋 I built this one for you lot! **What it is:** a real-time multiplayer flight game that runs in the tab you already have open. You land on what looks like a pane of frosted glass with a glowing handprint and one word: DON'T. Press it anyway. The floor shatters and you fall into a shared sky with everyone else who is on the site right now. **How to play — this is the entire list:** • WASD to steer, drag the mouse to look around • Shift to boost, Space to hover • Fly through the glowing Energy Cores. Your light trail IS your score • Cut ACROSS someone else's trail and it snaps. Whatever falls off is loose for anyone to collect. Your own colour can never cut you • Double-tap A or D for a barrel roll that shoves everyone near you away and makes you briefly uncuttable • The spiked dome charges up and then opens. First one to the core floating above it gets 20 seconds where their trail cuts anyone who touches it • Four rare nodes stand in tall columns of white light. Fly through one and your craft transforms into a Phoenix, Prism or Void for the rest of the session. It grants no advantage at all. It just means everyone in the sky can see you coming! In-game, "Longest trail wins" **Under the hood:** Next.js + React Three Fiber on the front, a Colyseus server on Fly.io running authoritative physics at 20 ticks a second, with client-side prediction and reconciliation so it feels instant even from the other side of the planet. Both halves run the identical physics code out of a shared package, which is the only reason the prediction lines up. It is also capped at 64 people flying at once. I load-tested it properly and the tick rate falls off a cliff past about seventy, so rather than let a busy day turn into a laggy mess for everybody, the ceiling sits below where I measured it sagging. So if you land in an empty sky, it is either a quiet moment or the server politely telling you it is full. Either way, give it a few minutes and come back, or drag a friend in. It is a much better game with someone to cut up. It is free and always will be. Tell me what breaks! 🙏

Shard Islands

Press the handprint... The floor shatters... You're flying!

Press the handprint... The floor shatters... You're flying!