ive been working for one year with the engine and iam about to create a builder game called “Weltenbauer”. You can watch the progress on my Youtubechannel:
Looks interesting so far, great achievement within a year. The UI is pretty managable currently.
One thing I wonder is the name “Weltenbauer” though. Since you are from Germany you should know that there is a company with the exact same name ( i think they do the Simulator games). should be carefulkl not to get into legal troubles if you plan to release yours.