ExtremsX Eastern Exorcist Review

The game has some bugs that are preventing me from getting past the tutorial. First, there's a part where I'm prompted to use a health potion to recover my health. I've pressed the "O" key, but it doesn't work. I also tried changing the keybinding, but that didn't help either. Second, still in the tutorial, my character will sometimes clip through the ground while attacking. This makes me unable to perform any of the actions required to complete the tutorial.