digraph Model {
    edge [minlen = 6];
    graph [overlap = false];

    stats [shape=box,label="Stats"];
    inv [shape=box,label="Inventory"];
    skill [shape=box,label="Skills"];
    world [shape=box,label="World"];

    stats -> stats [label="temperature > 40 -> health--"];
    inv -> inv [label="1 log -> 4 planks"];
    inv -> stats [label="health crystal -> health + 5"];
    stats -> world [label="furnace -> room temperature + 5"];
    world -> stats [label="hot room -> player temperature + 2"];
    skill -> world [label="use skill explode -> boom!"];
    skill -> stats [label="use skill heal -> health + 10"];
}