First of all, I managed to fix the enemy bugs, especially in the chapel, because there was another mob that didn't take into account the auto-attack mechanism attack, so I removed it. This made a big difference to the second enemy on the map in the first chapel, and I added a computer with Windows XP startup. How nostalgic it is when I think back on it, but if you know what I mean, well, there you go.
Another thing I did was fix the change to the first mob. I removed the explosion because I thought it was lame and ruined the immersion right at the start of the game.