One of the things I have seen in the game is the push-wall moving 3 spaces (tiles?) instead of just two. I didn't think it was a bug because it seems like Id made use of it in the maze on E2L8. There is a place where there are 2 push-walls side-by-side, and if the wall you pushed to get there only moved 2 spaces, one of the side-by-side walls is blocked and you can't get to the room with the free life. The other one blocks the door to the room, so it appears they gave you a choice if the one you pushed to get there moved 3 spaces instead of 2. Also, at the Apogee/boss area at the end is another set of side-by-side push-walls. If you push the one that blocks the room with the Apogee sign, you can reach the boss. If you push the other one, you get to the sign. Well, if you push the one that gets you to the boss, then push the one that would be blocked by the other one, then push the other side-by-side wall, it can move 3 spaces, or it may only move 2. I have found 2 other levels where a wall can move 3 spaces, and in both cases a treasure will be covered up if it moves 3. The thread on diehard doesn't say whether or not there's a fix to that, but given what happens on E2L8 with that room with a free life, I'm not so sure I'd want to fix it. I'd rather figure out how to make it work when I want it to and then make the maze work right.