Yloa’s Complex is a nice Lady Tut clone which was being done by Marcus Oliver Wagner back in 1987.
Marcus did a number of C64 games that never saw commercial release, and very kindly released them into the wild on his website at https://sites.google.com/site/ccpcommodore64/
This seemed to be coming on well, and even had a level editor too, and it is a shame that it never saw a proper commercial release of some kind, as it probably deserved it overall.
Thankfully as a result of Marcus’ kind self preservation, you can check out the game for yourself. We hope to learn more about it some day and update these pages too.