BRIDGEBURN
Hold the bridge. Alien hordes pour down the lanes — and the bridge itself breathes, widening to four or squeezing to two and your gun fires on the track's beat by itself — tap a lane (or arrow keys) to stand in it, and only your lane gets shot. Every eight bars a gate row descends: each lane carries a different fate — gun upgrades, extra shots, shields, horde maths (÷2 is a gift, ×2 is a curse) — and you take whatever gate you're standing under. Kills drop 🔩 salvage — spend it in the Armoury: ↔️ WIDE fires your volley down three lanes at once, 🏰 BARRAGE lands a heavy shell down every lane on each bar’s downbeat (the answer to a six-lane bridge, rationed to the ONE), ⛓️ TESLA chains lightning to the nearest enemy anywhere, and 💪 buys permanent damage at an ever-rising price. Enemies that slip down other lanes bleed score and thicken the horde. Survive the whole track to hold the bridge.