We just fixed a bug that could make Char Wuf invincible and invisible once she used one of her attacks in a specific alignment, forcing you to either quit the stage or use stumble until Rei-bo dies. We also added a button on the main menu that takes you to the bugs report channel in our Discord server but feel free to use Steam to report any bug that you find.
We'll keep updating the demo for any major bugs that you find but QoL changes/additions are most certainly going to be made once the full game releases.