Sorry for the late reply. But better late than never ^-^'
I'm happy you enjoyed it! Normalin's design was ok at the time, but I'm sure I could do better if I gave it another shot with my current skills :D
I always thought that the camera controls felt right, despite the many complaints. Maybe its the fact I always test my games with a controller that I don't realize the mouse/keyboard controls are terrible.
The knife puzzle is a bit bullshit actually if I'm being honest. It makes use of a game mechanic that isn't demonstrated anywhere else and nobody would be able to guess intuitively. So for that one you can blame my failing as a game designer.