Hi,
Sure, if other people also want the ability to customize the “x” I’ll definitely consider adding it.
There’s a class ‘mapp-links’ applied to the div container for the links. You should be able to style them that way.
If you want to add javascript, look at the PHP code for get_links() in file ‘mappress_poi.php’ for some examples.
You can use the filter ‘mappress_poi_links_html’ to generate your own links and override the defaults.