Don't remember which core I was about to start working on, but possibly the green. It's supposedly not a game breaking bug. Suddenly found myself in a room that I was not supposed to have access to yet and found no way out (apparently there´s a workaround to leave the room). I'd rather wait until the game has bugs like these fixed before continuing.

I have completed the game and it ran perfectly. In fact I was commenting to myself at how smoothly and glitch free it ran. I had forgotten so much about playing the original version over 6 years ago that this was like playing a brand new game.