I love it!
I love the original idea, I love the awesome 8-Bit style, I love the annoyingly catchy music and I love that it gets seriously challenging later on. So, in summary, your game gets my first ever 10-star review here on Newgrounds :-D
Also, I'm definitely a Questy fanboy now. I want Questy T-Shirts, Questy coffee mugs, Questy underwear, Questy condoms, a Questy breakfast cereal.... oh, and most importantly: MOAR QUESTY GAMES NAO!!!11!11one