You did notice the combinations written on the walls next to the doors. Right?No, and as a modder you cannot assume that a player will notice such a minor detail just because you put it there. Especially when the mod is so dark (I know I'm not the first to say this, so maybe you guys should check it out).
You didn't offer any opinions. You stated in capital letters that things were impossible, which are not impossible at all.I'm not really siding with Penguinboy here, but I must say that I feel the same way as him. You cannot assume that a player will know exactly what to do, and may find it 'impossible,' even if it is possible.
How is that constructive criticism, or even an informed opinion?
The main problem I have with this mod is that the authors assumed the players would know what to do based on little (not very noticable) hints.
You really need to make the goal and possible solution obvious, or players will get frustrated and not enjoy your mod.
Just my opinion, though.