- The test should maybe show a green check mark
- Each Koan should have a Haddocked substructure
- If bug in HLS can't be solved, provide my own hie.yaml
- Check cabal outdated
- Check in diffs between solution and problem and make sure it is stable (such that every fix in a solution gets propagated to the problem and vice versa)
- square that rotates with time
- paint, clear, paintAll: Maybe more complicated program with several paint calls, picture builds up if you forget to call clear