Hey, I finally finished the game, I did the pacifist route and managed to reach the end, thank you very much...
About bugs? I didn't see any that interfere with the gameplay or anything like that, just a few visual bugs in some enemies (Jerry, and Sans' attack when he raises his hand, and in the passage before facing Jerry there's a gift monster that also looks a bit buggy, and the credits scene after you see Undyne and enter the door crashes the game) but aside from that? The game is in perfect condition, now anyone who wants to play can play without any problems. Good job!