I love the concept. I think the trick to being successful with a project like this is cracking the user experience in a way that makes it powerful enough to be truly useful, while keeping it simple enough that a child can build (scr)apps (c.f. Super Mario Maker).
Making it possible to lookup and store data in a spreadsheet (maybe using something like the Google Sheets API) could unlock a huge amount of use cases.
I'll be watching this project with interest!