I've just uploaded a new demo update with a few minor changes.
Changelog:
Settings have been re-enabled and now include more customization options.
Adjusted AI pathfinding: enemies are now more willing to follow maze-like paths and will only break nearby walls when the detour is too long.
Rebalanced difficulty progression, as later waves were too powerful.
If you encounter any bugs or issues, please feel free to report them. Thank you very much for your support!