Hello Markus,
The project looks like a promising tool we could use as part of ClojureBridge London events. Either as a demo or incorporated in one aspect of working with Clojure.
We have several learning paths to help people discover Clojure, including Maria Cloud and Klipse based approaches. Our events attract people from a wide range of experiences, from developers new to Clojure to people new to coding.
I hope to find time to experiment to see how best we can add Blockly to the experiences we currently offer.
Thank you for sharing this wonderful project.
John.