It is not possible at this time

I'm sad...

"at this time" means the feature does not exist today. There are future plans to implement a saving feature. Welcome to ez-robot, new features are added weekly. The progression of ez-robot features is among the most that you will ever experience compared to any other product. I recommend participating and enjoying the product while new features arrive. Additionally, there are literally thousands of features that you have yet to explore.

Hello tkristof, I know you were asking about the Mobile version, but did you notice that the Windows version does preserve the RoboScratch?

Frank

Both Windows and Mobile saves RoboScratch. As well, there's a new Blockly for ARC: https://synthiam.com/Community/Questions/9906