You aren't a native speaker and wrote your dissertation in English? Wow! This is extremely impressive - many compliments!
I have a question if you don't mind:
You say Psychonauts is a platformer.
I am not at all familiar with this expression - what is the significance of a platformer?
(Sorry for bothering, if the explanation comes later in the text)
As far as me concerns Psychonauts is an (extremely difficult, but wonderful) action-adventure.
