Level 7 broke my brain, but level 8 seemed more straightforward and fun. I didn't find 11 tedious. It was fun to figure out what to be done pretty immediately and just execute.
I took one look at 12 and thought maybe this isn't going to be fun. But then I sort of realized what was going on and thought that it definitely was going to be fun. And then I made a mistake and wasn't very motivated to continue.
Seems like a pretty unique puzzler though, and fits the theme really well.