First of all, I think VVVVVV is an awesome game, but you should not list it in a budget thread. It's heavily overpriced for the 2 hours it lasts, imho. I still love the game and have it on my 3DS and it looks and plays awesome, but I still think this game should be 5 bucks max.
It lasted me 4 hours but probably 1 hour just for that fucking "Vidi, Vici, Veni" part lol.
I have it both on 3DS and PC, and yeah, unless you really want to play it on the go, the PC is more attractive price-wise. I bought it for 1.49.