Thanks for your message. Underland is a huge project that I unfortunately stopped due to lack of time. But maybe I should finish it?!?!
Its a very popular game style for any platforms so it would be nice, also you can read the positive opinions from the past from two different places: Underland (C64) - 2007 Marcus Wagner - GTW64 and https://csdb.dk/release/?id=144117. But of course everyone knows how it would be a time-consuming project.
Thank you very much for the links. I didn't know that there was anything about "Underland" on the Internet. The project became very, very extensive and time-consuming. I would like to finish it, especially because I have already invested over a year of development time. Let's see, maybe I can bring myself to finalize it.