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KLASHLINE
Play Lab

Free browser whip game · no download · no clicks

Lashline
the whip game your mouse plays.

Run an endless forest at dusk with a lantern and a real physics whip. Flick the mouse to crack it; the crack is the only weapon. Thornlings, moth swarms and a Warden that blocks the trail, a daily seeded run and country leaderboards.

  • —fps in this tab
  • —your best score
  • —runs posted today
  • 6creatures, 4 biomes

How to crack

Three motions. No buttons.

The whip is pinned to your hand. Everything you do with the mouse is a wind-up, a flick or a stop; the game reads the tip, not your clicks.

The glowing whip tip hovering over the night trail as a Thornling and a moth swarm approach
slow = aim, never a crack
1

Aim with the tip

Move the mouse. The glowing tip of the whip is your aim: it goes exactly where the mouse goes, and a crack carries from it to anything under it up to ten metres away. Slow movement only aims; it never cracks.

A perfect whip crack bursting gold on the trail and cutting through a moth
fast, then stop · 6.5 m/s
2

Flick, then stop

A short, fast flick and a hard stop: the moment your hand passes 6.5 m/s the whip snaps at the glow. The gauge under the trail turns gold as it happens and marks how fast you went. 11 m/s is a perfect crack and pays 50% more; a hard 5 cm flick gets there.

A gold targeting ring locked around a Thornling under the whip tip
gold ring = crack now
3

Crack on the gold ring

A gold ring closes around a creature when the tip sits on it and it is in reach: flick then. Sweep sideways through a moth swarm to take every moth the tip crosses, crack the Boar twice, and hit Wisps to relight a lantern. A crack that touches nothing is a whiff and resets the combo.

Bestiary

Six things on the trail. One answer each.

Every creature is introduced the first time it appears. Read the tactic once and the run explains the rest.

Thornling, rendered in the game

Thornling50 pts

Scuttles low along the trail. One crack. Keep the tip low so it sits on the ground in front of you.

From the start
Ash Moth, rendered in the game

Ash Moth30 pts

Swarms of three to five at chest height. A horizontal sweep through the swarm scores every moth the tip touches.

From 110 m
Bramble Boar, rendered in the game

Bramble Boar120 pts · 2 hits

Big, two hits, charges once it is close. Crack it early, then crack again on the charge.

From 320 m
Wisp, rendered in the game

Wisp150 pts · harmless

Harmless bonus light that weaves side to side. Worth three Thornlings and relights a lost lantern; crack it as it crosses the middle of the trail.

From 200 m
Vine Snare, rendered in the game

Vine Snare60 pts

Rises from the ground across your lane. It does not move on its own, so time a low crack as it comes up.

From 460 m
Hollow Warden, rendered in the game

Hollow Warden200 pts · 3 hits

Blocks the trail every 800 m. Three glowing knots, each worth 200. Clear all three before it closes the distance.

From 800 m

Daily run

Same trail for everyone, one day only.

One seeded trail per UTC day. The same creatures in the same order for every player, a world leaderboard and one for your country. Endless runs post to the open board.

  1. Loading…

Ranks

Five names the forest gives you.

  1. Wanderer0+

    You walked in. The forest noticed.

  2. Tracker1,500+

    Cracks are landing. Now keep the combo alive.

  3. Ranger4,000+

    You read the trail. The Warden has a name for you.

  4. Warden9,000+

    The forest keeps its distance from you now.

  5. Legend16,000+

    Lantern, whip and a trail that never ends. Legend.

Mouse setup

The crack is a speed measurement.

Lashline reads how fast the tip moves, so your mouse settings are part of the game. Four checks, each one a Keymap Labs tool.

Find the flick

Set Sensitivity so a relaxed 4 to 6 cm flick just turns the meter gold. Too high and every twitch cracks; too low and your arm does the work.

Sensitivity converter →

Know your real DPI

The hand moves a fixed distance per count, so a mouse that reports 1600 DPI but delivers 1550 feels slightly slow. Measure it once.

Mouse DPI analyzer →

Polling rate is timing

The crack is a speed measurement. A stable 1000 Hz mouse gives the rope clean velocity samples; a 125 Hz mouse can under-read fast flicks.

Polling rate test →

Train the aim

Lashline rewards a fast wrist and a precise stop. AimFlow trains the same muscles on targets instead of creatures.

Open AimFlow →

FAQ

Straight answers.

Is Lashline really a free whip game with no download?

Yes. It runs in your browser with WebGL. No installer, no account, no paywall. Results stay on your device unless you post a run to the leaderboard with a display name.

How does the whip crack without clicking?

The game reads the speed of your hand every frame. A flick that peaks above 6.5 metres per second is a crack, above 11 a perfect one, and it fires at the peak of the motion, 50 to 80 milliseconds after you start moving. The crack carries along your aim through the glowing tip, up to ten metres (twelve for a perfect crack), and strikes whatever the tip crossed during the flick.

Is this a whip simulator?

The rope is a real simulation (a 26-segment Verlet chain with gravity, damping and the air stream of your run), so it behaves like a whip: it needs speed, it cracks at the peak of the motion and it streams ahead of you as you run. It is tuned for play, not for physics teaching.

Does my mouse sensitivity or DPI matter?

Hand travel per mouse count is fixed, so a higher DPI mouse moves the hand further for the same physical distance. Use the Sensitivity setting to make a comfortable 5 cm flick reach the crack speed. The DPI analyzer and polling rate test on Keymap Labs show what your mouse actually delivers.

Can I play on a phone or tablet?

Yes. Drag with one finger; the hand follows your finger and a fast flick cracks the whip. A mouse gives finer control for leaderboard runs.

What is the daily run?

One seeded trail per UTC day: the same creatures in the same order for everyone. Scores go on a world leaderboard and a leaderboard for your country. Endless runs use a random trail and post to the open board.

How is the score calculated?

One point per metre plus creature points (Thornling 50, Ash Moth 30, Bramble Boar 120, Wisp 150, Vine Snare 60, Warden knot 200) multiplied by your combo (up to ×3) and by 1.5 for a perfect crack. The server checks every posted run against those rules.

What does the leaderboard store?

A display name you choose, a country you can change, the score, distance, best combo and a hashed connection identifier used only to limit posts. No email, no account, no tracking across sites.