Play ZUPI
Keep the Pulse Core alive for thirty seconds without ever holding still — and save the Pulse for what the shield cannot stop.
Interactive recreation
Keep the Pulse Core alive for thirty seconds without ever holding still — and save the Pulse for what the shield cannot stop.
No install, no sign-in. About a minute.
Understand why the three-second stillness rule shapes everything, and what the Pulse is for — the threats a shield cannot stop.
A recreation, written for this site. It is not ZUPI’s code and does not claim to be: the shipped game’s source is not in the studio’s repository, so this was built from the public App Store listing — the Pulse Core, the three-second stillness rule, deflections charging a Pulse, six of them per Pulse, armour-plated threats that only the Pulse breaks, splitters, trackers and guard bands. The numbers and behaviours come from that listing and its screenshots; the levels, the difficulty curve and the feel are this site’s, not the game’s. Until 2026-10-03 this page ran the previous game’s engine and said it was the shipped one. See the product.