I would prefer the second option just because dark elements make the characters stand out more. Not sure if I'm completely in love with this tone of orange, but I like that you changed the bottom from the light green to something dark.
Though, it my be just my preference. Hopefully, you will be able to get more opinions about that :) I would suggest to try some combinations of complementary colors, though. They usually work really well together. If you have more questions, I will be glad to answer them!