Hm. I really enjoyed this story. It started off with a rather common theme in writing, but I'm glad I continued reading due to the fact that you didn't leave it normal. Really enjoyed the creative twist at the end there. Even with this, there were a few things. First off, I couldn't tell if Prosper or Acacia was older, and I couldn't even guess their relative ages, though I would assume that they were a few years short of teen years. But if this were the case, I don't think that they would openly use "hell" like so. If you are trying to portray them as older than preteens, I would add characteristics to the characters, such as appearances and the likes to give the reader an idea of what age they are...for numerous reasons.