[arudaev]

Stack: 4 of 11 (playtest): base #214. Merge bottom-up, only on Alexander's word.

What and why

Playtest J6 (Vatsal, A15): Jenny's arena is "awful to fight in" with limited movement, so "add platforms in the middle". There are now two girder platforms hung on chains from the girder over her arena:

• Redrawn after Alexander's review. The first take was a strip cut from the maze plate's front face. It read flat next to the game's volumetric pixel art, and it floated with no reason in the world (no glitch, no structure). Now there are two boards in the game's look:
  • arena-platform: a riveted box girder with a lit top flange and a grated underside, drawn from the coffee-machine sheet's look with the maze's own girder as the material reference;
  • arena-chain: a rusted chain.
• scripts/arena_platforms.py composes them into the overlay plate. Each platform hangs on two chains that tile the chain's measured link period up to the underside of the girder above, measured from the traversal plate. The same numbers write the one-way lines.
• Heights: the tops are 84–89 px over the walk line, reachable with a full jump (96 px). The 25 px girders end at y 500, so Jenny's 56 px body drives under them: stand on one and let her charge pass.
• An overlay layer: 05-arena in the anomaly state, flagged "overlay" and "optional". The game draws it, but it stays out of the masters (creek_layers.py pins them) and out of --verify.
• scripts/backdrop_check.py: puts any PNG over the debug purple and over white, and counts key specks, soft pixels and enclosed holes. It caught 30 pinholes in the first take's beams.
• J7 (a visible wall) was done in feat: chair reach, low sweep, dodge-dash, target assist, laptop keys #186; the sprite walls are [6/8] feat(art): Jenny's arena walls as a sprite #217.

Issue

Refs #72 (playtest checklist J6 and J7 ✅)

Verification

• npm test: 332 passed (arena.test.ts: two platforms, reachable from the walk line, clear of her body). pytest scripts: 115 passed. creek_layers.py verified; export_stage.py --verify exact; collision check 0 problems; check_docs clean.
• backdrop_check.py on the plate: no key specks, no soft pixels. Its 3012 "holes" are the insides of the chain links (the sheet over purple and white shows nothing else).
• In the game (dev server, debug mode): the arena with 05-arena shown alone and with all layers, over purple and over white, while the fight runs. The chains reach the girder and nothing shows through.
• Not done: a full fight using the platforms (the hidden pane runs at about 3 fps); Alexander's review of the two boards (🟨).

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Project	Deployment	Actions	Updated
wincs	Ready	Preview	Oct 25, 2026 11:58am UTC