{
  "levels": [
    {
      "id": 1,
      "name": "Getting Started",
      "description": "Learn the basics by reaching the target score",
      "constraints": {
        "targetScore": 1000
      },
      "objectives": {},
      "starRating": {
        "criteria": "SCORE",
        "thresholds": {
          "oneStar": 1000,
          "twoStar": 1200,
          "threeStar": 1500
        }
      },
      "availableGemTypes": [0, 1, 2, 3, 4, 5],
      "unlocked": true
    },
    {
      "id": 2,
      "name": "Move Master",
      "description": "Reach the target score with limited moves",
      "constraints": {
        "targetScore": 1500,
        "maxMoves": 20
      },
      "objectives": {},
      "starRating": {
        "criteria": "MOVES_REMAINING",
        "thresholds": {
          "oneStar": 0,
          "twoStar": 5,
          "threeStar": 10
        }
      },
      "availableGemTypes": [0, 1, 2, 3, 4, 5],
      "unlocked": false
    },
    {
      "id": 3,
      "name": "Time Trial",
      "description": "Beat the clock to reach your goal",
      "constraints": {
        "targetScore": 2000,
        "timeLimit": 60
      },
      "objectives": {},
      "starRating": {
        "criteria": "TIME_REMAINING",
        "thresholds": {
          "oneStar": 0,
          "twoStar": 15,
          "threeStar": 30
        }
      },
      "availableGemTypes": [0, 1, 2, 3, 4, 5],
      "unlocked": false
    },
    {
      "id": 4,
      "name": "Color Focus",
      "description": "Clear specific gem colors while reaching the score",
      "constraints": {
        "targetScore": 1800
      },
      "objectives": {
        "clearGemTypes": {
          "0": 15,
          "2": 12
        }
      },
      "starRating": {
        "criteria": "EFFICIENCY",
        "thresholds": {
          "oneStar": 1800,
          "twoStar": 2200,
          "threeStar": 2600
        }
      },
      "availableGemTypes": [0, 1, 2, 3, 4, 5],
      "unlocked": false
    },
    {
      "id": 5,
      "name": "Ultimate Challenge",
      "description": "Master all skills in this combined challenge",
      "constraints": {
        "targetScore": 2500,
        "maxMoves": 25
      },
      "objectives": {
        "clearGemTypes": {
          "1": 8,
          "3": 10
        }
      },
      "starRating": {
        "criteria": "COMBINED",
        "thresholds": {
          "oneStar": 2500,
          "twoStar": 3000,
          "threeStar": 3500
        }
      },
      "availableGemTypes": [0, 1, 2, 3, 4, 5],
      "unlocked": false
    }
  ]
}