Hi,
I have two link that can be interesting for you :
http://www.liverobotcontrol.com , a old “game” where you reserve a robot for some time and control it to do some pick and place task.
https://www.poppy-project.org/en/robots/poppy-ergo-jr , an educational robot arm that can be programmed with snap! from a web interface.
I actually use Blockly (more or less an old version of snap) to let people (non-developer) program robots arm at work, it work pretty well.
Is your vision something like a mix of these 2 links ? Like a ROS controlled robot from snap! with a webcam and reservation system ?