book about a guy who goes to a video game company but everyone leaves and there's a lot of flashbacks about his friend and the game he made called something like ROGVIII and there's also a game engine that he is tested on (YA/Fiction)

[Valerie]

read in 2016, the book was relatively brand new, the cover was pixelated on both sides and the back had a pixelated computer and the front had a rainbow and a guy pointing upwards

[Ayshe]

You maybe?