Hey, thank you so much! ^^
1. That's an annoying bug yeah, it will be fixed in the next version. It has to do with the resolution of your screen, and sadly the best I have for this current version is to fiddle with the resolution or the fullscreen settings and cross your fingers. There is a chance that your cursor will get stuck in a corner of your screen by doing that though, in which case you'll have to close the game and reset the settings by going to AppData\Local\BE_Witches_20_08_2020 and either editing settings.ini yourself, or simply deleting it (a new default one will be created once you reopen the game). Sorry about that...
2. Yes! They will eventually be.
3. They have 5 unlockable ranks in the demo, and there will be a 6th one in the final game ^^