I would like to use it in my game, there are any problems?
Nope. No problems, so long as I am listed in the game credits and on Newgrounds(under the 'CREDITS AND INFO section) as a 'Contributor.' I don't mind at all. I'm happy making music and hope more people hear about me and ask for project works and other stuff. Glad you like it. Let me know how the game turns out.
Amazing song. I recommended you.
Well thanks bud! I appreciate it. Much love.