The main game uses the layout seen here: a vertical Brain Age-style orientation, with the actual game view stretching across both screens. The use of first person is apparently a design decision, with the intention of making you feel like you have no idea what's behind you. It also uses some kind of 3D sound programming to be even more immersive.
Nanashi no Game is about a student who becomes a sort of hero to his peers by bravely playing an old game that is supposedly cursed. When he goes home, he finds -- a portable copy of that same game! (scream) The title screen of this retrogame is even all glitched out for extra creepiness.