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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.

1

Steer the tip

Move the mouse. The whip streams ahead of you and its glowing tip floats about five metres down the trail: that is where a crack lands. Slow movement steers the tip; it never cracks.

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 meter on the right turns gold as it happens. 11 m/s is a perfect crack and pays 50% more; a hard 5 cm flick gets there.

3

Crack when they reach the glow

Flick when a creature reaches the tip. Down for Thornlings and Snares on the ground, up or sideways for moths and Wisps in the air, twice for the Boar. 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.

Thornling50 pts

Scuttles low along the trail. One crack. Flick downward so the tip reaches the ground.

From the start

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 Boar120 pts · 2 hits

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

From 320 m

Wisp150 pts · harmless

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

From 200 m

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 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 lands at the glowing tip ahead of you and the rope, a physics simulation pinned to your hand, snaps through it.

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.