This is a super neat idea! Worked really well for creating brush and spray paint tools. Not so much for a marquee / selection tool, however. Found a UI bug as

This is a super neat idea! Worked really well for creating brush and spray paint tools. Not so much for a marquee / selection tool, however. Found a UI bug as well - when you refresh the page, then click a tool, try to use it, then click 'load all', it duplicates the initial tool you chose.