Sooo, I finished the game a couple times and now I am at trying to find hidden extras. ^^
So I decided to play around in Lvl 3 after crashing the little chariot-thing with a pointy end into the huge container full of ink.
I started trying to hit the computer screens with my flail (sword) to see if it did something and I found out I could pass through and go behind the wall there, so I did. There I found a sort of hidden passage leading to an endless blue void apparently empty. I tried checking the area inch by inch hoping to get my character to bump into something, but at some point I think I walked him too far off, lol. I just couldn't find him anymore or bring him back, so I just gave up the level.
My question is, did anyone find something over there? Is it worth exploring?