Currently i use my Nextcloud instance with the Tasks App but i look for something like Vikunja myself. Last weekend i tried to install mmdl on my server but unfortunately i got an error. It is labeld as alpha and got a new release last week so i hope i can test it this weekend. https://intri.in/manage-my-damn-life/

i loved it too :) used to play it in the hotel on my weekly vacations. with about two hours of playing per week this game kept me entertained for a month!