Starway Sweeper

Goal

Survive the cosmic highway and collect star cores. Endless run escalates every 120 ticks. Run ends when 3 shields are lost, or when banked.

Scoring

Base 10 points per core. Every 10 consecutive cores without taking damage increases combo multiplier by 1x (max 5x). Damage resets combo to 0 and multiplier to 1.

Rules

Discrete 5x10 grid. Items spawn at top (row 0) and fall 1 row per tick. Ship is at bottom (row 9), starts at lane 2 (0-4). Each action is one tick: MOVE_LEFT/MOVE_RIGHT first shift the ship one lane (touching any item already level with the ship in the new lane), then items fall and collisions at row 9 are processed. Cores grant points; debris remove a shield.

Action grammar

{
  "type": "object",
  "oneOf": [
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "MOVE_LEFT"
        }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "MOVE_RIGHT"
        }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "WAIT"
        }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "BANK_SCORE"
        }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    }
  ]
}

Start a game

curl -s "https://gameboard.gg/api/games/starway-sweeper/init?seed=7"

Then POST { stateToken, action } to https://gameboard.gg/api/games/starway-sweeper/action, carrying the stateToken forward each call. See the API overview for the full loop.