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side-scroller

Skill2 starsChanged 49 days agoApache-2.0View on GitHub

Entry point for a 2D side-scrolling game slice — parallax background layers, a playable level built from the platformer curve, the sprite set, and a playable HTML prototype when a runtime is available. Use when the user says "side-scroller", "2D platformer", "Metroidvania", "run and gun", "horizontal level".

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SKILL.md

Side-Scroller

Ship a playable slice of a 2D game, not a mood board.

What the user gets

DeliverableFormat
Parallax set3–5 background layers per biome, seamless horizontally, from one locked plate
Leveldesigned via platformer-level, expressed as a tile map
Spritesvia pixel-art-sprite (or a painted 2D style card if the project is not pixel)
PrototypeHTML5 (Phaser/Kaplay or plain canvas) with movement, one hazard type, one collectible, a checkpoint
Trailer (optional)15–30 s video of the slice, camera following the player

Rules this entry enforces

  • Parallax from one plate. The far, mid and near layers are cut and extended from a single locked environment plate so the biome reads as one place.
  • Horizontal seamlessness verified. Each layer is tiled 3× before locking.
  • Movement numbers from platformer-level. Jump height, dash length and coyote time are the same numbers in the design doc and the prototype.
  • One vertical slice. One biome, one enemy type, one hazard, one collectible, one checkpoint. Breadth comes after the slice feels right.
  • Style card governs everything. Sprites, tiles, UI and parallax share the palette and outline rule.

Example

Biome: Rib Street (bone-brick ground, rib arches, lanterns, teal fog)
Parallax: far ribs (0.2×) · mid buildings (0.5×) · near lanterns (0.8×) ·
  fog overlay (1.1×, additive)
Level: platformer-level rooms R1–R6, exported as a 16-px tile map
Sprites: knight-cartographer set + bone-runner enemy + compass collectible
Prototype: Kaplay, WASD + space, one crumble-floor hazard, checkpoint at R5

Related entries

  • platformer-level — the level design
  • pixel-art-sprite — the sprites
  • environment-scene — the plate the parallax is cut from

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