Clever idea! It feels terribly rushed, though, so there's not a lot of skill involved in the drawings, just a frenetic attempt to get something done before the clock runs out...
You're totally right. And it's something I hope to separate out in future playtests, to see where the fun in quick scrawling is vs a longer and more detail oriented approach is. Whether both focusses can be in one game, I'm not sure. But I do need to find out where the most fun is - and if it's in both then I'll just make two games ;)
Inspired by your comment I've formalised this into my prototype plan: Have 2 dungeons in the prototype (selectable from titles), one using quick draws with a suitable scoring algorithm, and one focussing on slower but more accurate draws and suitable scoring algorithm.
This way I can get players to try out both without needing two builds, they can just explore and decide.
Again, thank you so much for taking the time to feedback. I really appreciate it :)