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Trapline: Checkpoints, Hazards and Lives Kit

A kit for platformers and obstacle courses: touch a checkpoint and it becomes where you come back; fall off or get caught by a trap and you lose a life; run out and it's game over, with Try Again for a clean run. Every player has their own lives and checkpoint, and traps move in step for everyone. 6 checkpoints, 12 hazards, 3 kill zones and 4 lives displays in cartoon, fantasy, sci-fi and pixel styles, each switched with one setting. Built on SecondWind, Lifeline, MatchFlow, juiceKit and barsKit. Play the showcase walk with a friend, or install the Trapline package into your own world in one step.

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Updated Oct 18, 2026
platformerobstacle-coursecheckpointstrapshazardsliveskitmultiplayer

Walk the showcase, alone or with friends. Four pads at the start switch your lives display (row of hearts, head and number, pixel 1-UP tokens, sci-fi pip bar). Then six sections each open with a checkpoint (flag, campfire, save crystal, pixel bell, beacon, teleport pad) followed by two hazards (spikes, lava, spinning saw, swinging axe, crusher, poison pool, falling rocks, flamethrower, laser grid, electric floor, bottomless pit, deep water). Near the end, three kill zones show their looks: an invisible boundary under the whole walk, a visible abyss you cross on a plank, and a glowing sci-fi out-of-bounds grid. Every part is labelled with its name, style and the one setting that picks it.

Lose all your lives and it's GAME OVER, with the lives you lost that run; Try Again starts a clean run from the start, with full lives and a deaths count of 0. Every player's lives and checkpoint are their own, and every player sees the traps move in step.

Use it in your own world: install the Trapline package. That one install is all: it brings the five kits Trapline is built on, at the exact versions it is built and tested on (SecondWind 1.2.0, Lifeline 1.0.1, MatchFlow 1.0.0, juiceKit 1.2.1, barsKit 1.2.0), with no order to follow. The package README lists each kit with its id and version, and has a first example with four hazards and two checkpoints that works in a fresh scene.

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