Hi mate! I have been programming at Ruby for several years just for hobby and i won't fail you.
My experience with Ruby is making simple games 2D for me. Good Luck!
I have 4 years of experience in different technologies and if you are still in doubt...then do check my profile and just think once. I won't disappoint you :)
This is a very simple task, and I'd be happy to complete it for you. I'm new to the site and hoping to establish a reputation here, so I'm very motivated to satisfy your needs and earn my first review on the site :)