You can change the zoom level and the center of the map by changing the part “/#2/28.3/-1.1” (zoom level / lat / long).
More information is available on the GitHub page
But be careful, this shouldn’t be included in high traffic pages. We are a voluntary project and pay for all servers with our money. So, we have only limited capacities.
If you want to help with the development of the map. The source code and install instructions can be found on GitHub