how to skip levels from demo?

Why?? D:

Hello, After starting the game, you can see the game loading on the screen and the images are changing. When the last image in the background changes while the game is loading, the screen remains black. - background music works fine and there is a black screen. Nothing continues to load. Tests performed; - Checking game files - uninstalling and reinstalling the game Please help....

Hey there, i am trying to play the game on my Linux Mint system but when i run the game, all i hear is main menu music with a plain blue window. At that state computer freezes and i just have to hard reset the computer. /.config/unity3d/THD/Butcher/Player.log is empty so i cannot detect a reason for this issue. my system is not great but with same laptop, but on ubuntu, i was able to run the game smoothly and i am able to run some other light games without an issue. (celeron, intel hd, 4gb ram) Any help...

it does remind me Abuse a lot, similar games like this? no puzzles, just shoot anything that moves.