Milla, don't post on other people's threads, make your own. Are you using regular Feral Heart or Feral Heart+ ?
If it's regular, try reinstalling the game, deleting the Feral Heart folder completely.
If that doesn't work, and after you've installed it still doesn't work, change your rendering system in the options menu when the game starts by going to the video tab, you'll have to restart your game for it start.
If you're using FH+, delete it and get the regular version.