The loop
Pieces fall. You place them into walls around your beacon while comets close in from all four edges. Survive the barrage, collect the salvage, dig in deeper. Then it gets worse.
Spend your salvage
Every cleared barrage pays out. Bank it between waves and put a system on the line — they unlock one at a time, in the order they earn their keep.
The wall itself
Close a bulkhead or ring the keep and the line hardens itself. Sealed walls take more hits before they break; repairs run on salvage.
System 01
A turret that fires back down its lane. Place it where the pressure is and let it work.
System 02
A drone that walks the wall and defuses the bombs stuck to it before they take a chunk out.
System 03
A shield that eats the next hits. Arm it before the line gives and buy yourself a breather.
System 04
A gravity field you drop onto a sector. It drags comets off course and grinds them down mid-flight.
What it is
Tower defense × falling blocks
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Accessible by design — color-blind-safe palette, full keyboard play, and reduce-flashing & reduced-motion options.