Thanks for getting rid of the delving cap! Edit: Well, very frustrating that you still insist on having one. For anyone reading this: Going past level 7 will end the demo.
I think that the tech tree does make sense in this iteration.
I just pushed a new version with small changes and once the demo is finished it requires around 40minutes you can still do level 1 mines and forest, there is no cap on them. And thanks for playing.