Based on your Next Fest feedback, update v5.11.2 of the demo is out!
New Feature: Added "Restrict dragging to vertical and horizontal lines" option in settings. This is helpful for those that use mouse or touch controls.
New Feature: Extra thick section borders: Can enable under 'Theme & colors" in settings
Bug fix: Fix for audio library crash that effected some players
Bug fix: Middle-button should now work when dragging to mark multiple squares.
I'm still working through demo feedback, so expect more updates either in the full release or as a quick follow-up.
Thanks,
Joel