How Lane Filter works
Lane Filter is a four-lane timing game. Packets fall toward a gate at the bottom of each lane. A lime circle means the gate should be OPEN. A red cross means it should be SHUT. You toggle a lane before the packet arrives. A match scores. A mismatch is a mistake. Three mistakes end the run. Speed rises as you score, so a pattern that felt easy at the start will not stay easy.
You are not steering a character and you are not clearing a match-3 board. Each lane is independent. The only question is whether the next packet in that lane meets the gate state you left it in. Points are 10 per correctly filtered packet. Finish & save writes the run to this browser. Switching tabs pauses the fall.
Controls
Press Start or Enter. Keys 1, 2, 3 and 4 toggle lanes from left to right. You can also tap a lane or use the four buttons under the canvas. Enter, Space or P pauses and resumes. On a phone the buttons are large enough for thumbs. There is no swipe and no hold-to-charge.
How it differs from other timing games
This is not Guitar Hero, not Piano Tiles, and not a falling-block puzzle. There is no song track and no colored fret. The packets are simple OPEN or SHUT flags. The skill is leaving the right gate for the next arrival, not hitting a note on a beat. It is also not a tower-defense filter: nothing shoots, nothing upgrades. Original canvas on this site, no portal embed, no ads, no account, no download.