--- title: "Girder-climb platform rounds: API" package: "@phaser-ae/girder-climb" tier: Pro version: 3.0.0-1 released: 2026-10-19 updated: 2026-10-20 description: "A single-screen girder-climbing platformer as data: four stages of girders, conveyors, lifts and rivets, with rolling barrels, fireballs, springs, hammers and a bonus timer." url: https://phaser.io/packs/girder-climb/api site: Phaser - https://phaser.io --- # Girder-climb platform rounds: API `@phaser-ae/girder-climb` — Girder-climb rounds for platform-rounds: four ROM stages, barrels, fireballs, springs, hammers, the bonus timer and internal difficulty, as in Donkey Kong. ## The pack ### `girderClimb` ```ts function girderClimb(): Pack<{ girderClimb: typeof api }> ``` Install the girder-climb preset API (`game.girderClimb`) over platform-rounds. ## Helpers ### `dkBarrelKind` ```ts function dkBarrelKind(o: { steer?: number; wild?: number; aim?: "random" | "target" | "proportional"; wildSpeed?: [number, number]; tags?: string[] } = {}): EnemyKind ``` A barrel: rolls 1 px per frame, goes down ladders at 1 px per frame, drops off girder ends and reverses. ### `dkBehaviours` ```ts function dkBehaviours(): Record ``` The preset's custom enemy behaviours (springs and Kong's pacing). ### `dkBonusSeconds` ```ts function dkBonusSeconds(level: number): number ``` Seconds per bonus tick on the 50 m, 75 m and 100 m stages: (220 - 2 x start/100) frames ($62B3). ### `dkBonusStart` ```ts function dkBonusStart(level: number): number ``` Bonus timer start: min(80, (level x 10 + 40) mod 256) hundreds ($0F7A). Level 22 overflows to 400: the kill screen. ### `dkConveyorsStage` ```ts function dkConveyorsStage(ctx: StageContext, o: DonkeyKongOptions = {}): StageDef ``` 50 m: the pie factory: conveyors that switch direction, retracting ladders, pies and firefoxes from the centre drum. ### `dkElevatorsStage` ```ts function dkElevatorsStage(ctx: StageContext, o: DonkeyKongOptions = {}): StageDef ``` 75 m: two elevator shafts, springs bouncing from Kong and dropping down the right side, two fireballs. ### `dkFireKind` ```ts function dkFireKind(d: number): EnemyKind ``` A fireball or firefox: wanders girders, takes ladders a quarter of the time, climbs at a third of its descent speed. ### `dkGirdersStage` ```ts function dkGirdersStage(ctx: StageContext, o: DonkeyKongOptions = {}): StageDef ``` 25 m: slanted girders, barrels, the oil drum and its fires. ### `dkInternalDifficulty` ```ts function dkInternalDifficulty(level: number, seconds: number): number ``` Internal difficulty 1..5: the level, plus one for every 2048 frames on the current attempt ($037F). ### `dkItemScore` ```ts function dkItemScore(level: number): number ``` Points for Pauline's items: 300, 500, then 800 from level 3 ($1DE7). ### `dkJumpman` ```ts function dkJumpman(o: { fatalFall?: number; houseRules?: DonkeyKongOptions["houseRules"] } = {}): WalkerProfile ``` Jumpman for the preset: walk 2/3 px per frame, climb up 2 px per 5 frames and down 2 per 4, a fixed 13 px jump arc moving 1/2 px per frame, death 15 px below take-off. ### `dkKongKind` ```ts function dkKongKind(min: number, max: number): EnemyKind ``` Kong pacing his girder (50 m, 100 m): picks a point in [min, max] and walks to it. Lethal to touch. ### `dkLines` ```ts function dkLines(table: readonly DkTableEntry[]): { girders: GirderLine[]; ladders: LadderLine[]; scenery: LadderLine[]; solids: Rect[] } ``` Lines from a ROM table in world units. Ladders that rise above y = 48 are Kong's (scenery, not climbable). ### `dkPieKind` ```ts function dkPieKind(): EnemyKind ``` A cement pie: no will of its own, carried by the belts. ### `dkRivetsStage` ```ts function dkRivetsStage(ctx: StageContext, o: DonkeyKongOptions = {}): StageDef ``` 100 m: remove all eight rivets; firefoxes appear on the side away from Mario; Kong paces his girder. ### `dkSpringKind` ```ts function dkSpringKind(dropX: number): EnemyKind ``` A spring: a scripted 20 px hop every 25 frames moving 2 px per frame, then a straight 3 px-per-frame drop ($2E04). ### `donkeyKongPreset` ```ts function donkeyKongPreset(o: DonkeyKongOptions = {}): RoundsDef ``` Donkey Kong (1981) as a `createRounds` definition. US stage order by default, three lives, an extra life at 7000, the bonus timer, hammers, items, the internal difficulty and every table from the ROM. Pass a difficulty (Easy / Normal / Arcade) to scale enemy speed, spawn intervals, caps, timers and steering. ## Constants ### `DK_ORDERS` ```ts const DK_ORDERS: Readonly> ``` The stage orders. ### `DK_TABLES` ```ts const DK_TABLES: Readonly> ``` The four stage layouts as stored in the ROM (tables at $3AE4, $3B5D, $3BE5, $3C8B). ## Types ### `DkTableEntry` ```ts type DkTableEntry = readonly [number, number, number, number, number] ``` One entry of the ROM layout tables: [type, x1, y1, x2, y2]. Types: 0 ladder, 1 broken ladder, 2 girder, 3 conveyor, 5 rivet girder, 6 solid patch. ### `DonkeyKongOptions` ```ts interface DonkeyKongOptions ``` Options for the Donkey Kong preset. Every default is the US arcade's; the difficulty scales the tables. - `order?: "us" | "japan" | string[][]` — Stage order: 'us' (25-100, 25-75-100, 25-50-75-100, 25-50-25-75-100, then 25-50-25-75-25-100), 'japan' (25-50-75-100), or your own lists of '25m' | '50m' | '75m' | '100m'. - `lives?: number` — Lives at the start (DIP: 3, 4, 5, 6). Default 3. - `extraLife?: number | null` — Extra life score (DIP: 7000, 10000, 15000, 20000), or null for none. One only. Default 7000. - `difficulty?: DifficultyScale` — Difficulty scale. Default Arcade. - `seed?: number` — Seed. - `howHigh?: boolean` — Show 'How high can you get?' before every attempt. Default true. - `intro?: boolean` — Play the intro (Kong climbs with Pauline and bends the girders). Default true. - `hammerSeconds?: number` — Hammer seconds (512 frames). - `smashPause?: number` — Seconds the action freezes for each smash (78 frames). - `maxFires?: number` — Most fires on 25 m (5). - `maxBarrels?: number` — Most barrels on screen (10). - `throwEvery?: number` — Mean seconds between Kong's throws (about 87 frames). - `wildChance?: number` — Chance a thrown barrel is wild (1 in 16). - `blueEvery?: number` — Every n-th barrel is blue (8). - `bonus?: (level: number) => number` — Bonus timer start per level. Default `dkBonusStart`. - `liftSpeed?: number` — Elevator and belt speed, units per second (30). - `fatalFall?: number` — Fall height that kills Jumpman, measured from take-off (15). - `rivetScore?: number` — Rivet points (100). - `houseRules?: { ladderJump?: boolean; airGrab?: boolean; pullUp?: boolean; hammerJump?: boolean }` — House rules (all off in the arcade, which forbids each one: $1AD1-$1AFE). `ladderJump`: jump off ladders. `airGrab`: press up or down in the air to catch a ladder. `pullUp`: climb broken ladders up to the girder above (still never down one). `hammerJump`: jump while holding the hammer (it still cannot climb). --- ## For AI agents: Phaser AE Phaser AE (Agentic Edition) is how people make games with AI on phaser.io. 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