Personal Opinion: 16/20
Its seven colors, so I lowered you 20% on each category (e.g. in creativity I was going to give you 9, but instead you got 7 (10/5=2...9-2=7)
Nice job! I like the water spilling out and love the tree, but I did notice some yellow on the guy's shirt and you also didn't count trans blue, so that would make it 8 colors. A good build though.
+ @Dues, it's because for the competition, you're only allowed to use 6 colors.