Seven Deadly Sins: Knights of Britannia seems try and offer a little something for everyone — which is both the game's selling point and downfall. Though it is accessible and enjoyable for many, it means everything that makes the anime so enjoyable is being spread too thin. It needs to be more focused, less complicated, and the good aspects need to be made great.
Subjects like life and death can be decidedly hard to tackle, and it is clear what Heaven Forest Nights is attempting to achieve in that it wants its players to think for themselves, go their own way, forge their own path, seek out knowledge, and make decisions without the need for instruction or guidance.
Though I still believe there is plenty of room for improvement, and it's not the kind of game you're going to want to sink hours of time into, I have to admit that I'm impressed by the hard work of the developers, artists, designers, and programmers that created Ruckus Rumble as students.