The compass puzzle with the dials that have N E S W on them is the hardest part in the game. The creator said on another site that the clue was left out on accident or something. Everything else in the game can be figured out.
There are 4 dials on top and 4 on bottom, I will put the letter that needs to be at the top of each one:
ewse
swnw
Besides that, I only had one other problem, that was finding one of the keys (forget which color) for the A levels on the map. It was in a room with tile walls, you have to use the screwdriver (which is found on the ground in front of a wheelchair in A levels, it's hard to see) on certain tiles on the wall that are an off-white or something color that's different from the other tiles.
Hope that helps anyone trying to beat this game