I've just recently finished a project in GDevelop 5 called Astro Dodge.  Some things that I think I did good is the level select system, but that could be better.  This was a huge learning experience for me.  During this project I've learned more about GDevelop and feel that I can take on more challenging projects and hopefully will be able to make a game that gets some traffic.  Some things that I need to work on is organisation and optimisation.  I would rate GDevelop as a 6 out of 10.  I plan on creating more games with GDevelop and hope that I can eventually start making money.  I plan on making more simple games and gradually getting harder and more complex projects.