Add these inputs inside your `#config-form`: ```html
<!-- Tile value range: negatives now allowed -->
<label>
  Min tile value
  <input id="cfg-val-min" type="number" min="-9" max="1" step="1" value="1" />
</label>
<label>
  Max tile value
  <input id="cfg-val-max" type="number" min="1" max="9" step="1" value="9" />
</label>

<!-- Target number for target-based rules -->
<div id="cfg-target-field">
  <label>
    Target
    <input id="cfg-target" type="number" min="2" max="20" step="1" value="10" />
  </label>
</div>

<!-- Enforce straight-line selections -->
<label>
  <input id="cfg-straight-line" type="checkbox" />
  Enforce straight-line selections
</label>
```