Fun game! I really liked the music and thought the foreground effects were slick. The player sprite was adorable! omg I busted out laughing when poison artifact killed me and the death gasp shot out. it was... AWESOME!
Some of the later levels were really short, I just grabbed the artifact and ran off?
I would definitely prefer to play it in the browser - which is super easy with Unity. Oh, and the gold total was just whatever that levels score was? That was a bit confusing. Fun title though, great job.