Thanks, glad you enjoyed it!
Level 11 definitely wasn’t intended to be solved like that, but I guess it’s fitting some levels of this game are cheesable, so I think I’ll leave it in. Someone else figured out quite some more improvements, by the way. Here’s what are (probably) the optimal drawings for each level:
SPOILERS
- 11: 2/5- 12: 2/4
- C3: 2/4
- C5: 4/5
- C8: 7/10 (haven't figured that one out myself yet, but I do trust the source)