This is the biggest issue for me right now "Saving/File handling in browser" - currently it's so easy to loose the progress (e.g. accidentally hit reload, close the tab, browser glitched).
I think it should instantly start saving into the local storage after the new project was created, even with "untitled" name.
Then when something unexpected would happened, on the next start it should ask "do you want to recover your last session from the local storage?"