Ailyn, I really love your colouring of the picture. One thing that really stood out for me was the background. It resembles grass (the lines of the blades of grass was well done) and the vibrancy of the green is fantastic.
The clothing was well done as well and I apologize for the lack of complexity with regards to the details of the clothes XD Despite this fact, you've done an amazing job (like the shading you did adds more depth and realism to the clothes).
The hair and the eyes were nicely done as well. They've got life in them.
In particular, I would also like to congratulate you on the colouring of the skin (and right down to the mouth bit too). The varying shade of the skin colour makes it look more realistic (akin to actual flesh). Very cool.
I also noticed the shadow outlining the bodies laying on the grass. Looks great =D
Overall, the mere attempt at colouring has brought out the liveliness in this picture and it's simply stunning. Since you said it wasn't that good can only mean that you are very capable of doing better. Cheers to you and you deserve a humble score of 8.8/10.
Notice: No flaming in this topic... PLEASE. This place is for art, the admiration and contructive criticism of art and everything that is related to art. Take it to the chat-room, but NOT here. Savvy?