Ueki no Housoku, Mirai Nikki Recommendations
Mirai Nikki-12 candidates fight to become God.
The Law of Ueki-fighting to make your "God Candidate" God.
both having to do with participating in a game/tournament to decide who will become God......Mirai Nikki has a much more serious atmosphere and the characters have more phsycological problems
The Law of Ueki is Shounen
Both are a compitition to become god, although the situations are slightly different. Mirai Nikki also is more mature and way darker then The law of Ueki.