Hi nelomaxwell!
Very sorry to hear that you are having issues with Demon's Sword Snakes installing on your computer.
We've checked out the ROM on our end and we were unable to find any issues.
Please send us any error reports that you are receiving while attempting to boot up the game!
Also, if you could please send us the specs of your computer, we will do what we can to assist you with this.
Kind regards,
MediBang