It seems strange to criticise 'Everything' for not necessarily being a game as it clearly does not intend to be a 'game'.
Everything seems to achieve what it sets out to do which I believe is create a mystical sense of oneness across all forms of being.
I think the experience loses much of its impact by relying on samples of lectures from Alan Watts. The developers should be confident in their own medium, and should not have to rely so heavily on established works (especially Alan Watts).
Otherwise the experience is unique, and is totally worth dipping in to.