There's another bug that has severely affected the gameplay exeprience, When I selected a different background color and play the undead campaign, finishing the tutorial level and move on to the map selection screen, the mouse UI is gone, I can't see the skeleton hand mouse at all, so I can't select anything in the map. I can't even press Esc to quit to main menu, I was dead locked in the map selection screen.
I can't fully enjoy the game, it quite unfortunate really, since the different background color looked so cool in the campaigns.
Perhaps it has something to do with the skeleton hand mouse thingy? It failed to appear on map selection screen in other background color.
