One rule: tap the circle while it's GREEN. Never tap it while it's RED.
Simple — until the Panic Meter starts filling. Every tap pushes it higher, and as it climbs, everything turns against you: the game speeds up, new hazards appear, green and red drift toward the same color, the screen pulses, and a heartbeat pounds louder and louder in your ears.
Hit 100% and you enter PANIC MODE — 15 seconds of pure chaos. Survive it and earn huge rewards. Then the meter resets, the tension rebuilds, and you go again.
★ THE PANIC METER ★
The longer you last, the more intense it gets. FLATLINE isn't about levels — it's about how long you can keep your nerve as the pressure builds toward a breaking point.
★ POWERUPS — EARNED, NOT BOUGHT ★
Grab them mid-run and tap to unleash:
• DEEP BREATH — slow time to a crawl
• FOCUS — the safe tiles light up
• ADRENALINE — double your score
• LUCKY TAP — survive one mistake
• FREEZE — stop every moving hazard
★ FIVE WAYS TO PLAY ★
• CLASSIC — one mistake ends the run
• REVERSE — the rule flips mid-run; trust nothing
• RUSH — 60 seconds, five circles, go
• SHUFFLE — the whole screen rotates as you play
• SWARM — one circle becomes twenty-five; just survive
★ BUILT FOR ONE MORE TRY ★
• Global leaderboards — climb the ranks in every mode
• Real reaction-time stats after every run
• Personal bests saved for every mode
• Instant restarts, no menus in the way
★ MADE TO FEEL GREAT ★
• Glowing neon visuals, satisfying taps, screen shake, and a rising heartbeat
• An original synth soundtrack that builds with your panic
• No ads. No tracking. Just the game.
How long before you flatline?