If it's good enough that I finished it I'm gonna let the creator keep the money (and pay close attention to the reviews next time, because I agree that less than 2 hours is a little short for that amount of entertainment) and make myself feel better by treating it like a donation to a good cause.

5 bucks for two whole hours of entertainment? Seems like a steal

This is like ordering a steak, eating it, then demanding a refund because it had too much gristle for your liking.

I spent less than a quid for a game that only took 15 minutes. I never considered that I needed to refund it. If it was fun, it was worth the money.