Turns out that actually finishing a game instead of just leaving it at ~85-90%, because it's playable from start to finish, takes a lot of work and effort.
When I made the game page 3 months ago, you could already play through FinsterMen from beginning to end. It just needed a "few" more things here and there plus some "polish"...which drained motivation quite quickly and I took a break, working on it only now and then.
BUT, I somehow made it through and now I am at ~98% (making up percentages is fun! Go on, try it out for yourself) with a release being imminent! Sometime next week to be precise.
Also, I finally managed to make a titlescreen (one of my worst nightmares):