Relatively simple, Child of Eden is also hugely repetitive. You are forced to replay archives in order to obtain stars to unlock the next archive, and as there aren't an awful lot of then, it gets bland very quickly.
I'm torn as to how I feel about Child of Eden. On one hand, it's a thunderous on-rails shooter, with a clever musical rhythm action scheme bundled with terrific colours. But, on the more critical hand, it's a bland, easily forgotten experience that frustrates more than it pleases, with tedious repetitive gameplay.
Child of Eden is always going to divide, with fans of the old Dreamcast gem Rez lapping it up, whilst the masses quickly grow tired of the colours and repetitive nature.
Child of Eden is rated E10+ (Everyone 10 and older) by the ESRB for Mild Fantasy Violence. This game can also be found on: Xbox 360.