le: null,    // current selected tile
        selectedCurve: null,   // current selected branch

        tiles: [],              // all of the tiles
        allEdges: [],           // all of the edges
        deletedEdges: [],       // edges that should be deleted

        audioURL: null,		// The URL to play audio from; null means default
        audioOffset: 0,

        minRandomBranchChance: 0,
        maxRandomBranchChance: 0,
        randomBranchChanceDelta: 0,
        curRandomBranchChance: 0,
        