That sepends on how good you are with the game. But it will probably take a while. I think a better option would be to stop wasteing time on these flash games, and go get a ps3!! I mean no offense by that. I only am saying that a game such as Sonny 2 takes way too much time to finish. Correct me if I'm wrong, but it also takes up a bunch of computer space. Just not worth the time.
hmm ... But i love Sonny xD , i just want to know the time needed in Hard for a good player like me , i'm not joking i'm good to RPG , and the Ps3 sucks for me. i want to play whit my mouse and get some good stuff in ArmorG. And for the Computer Space , let me laught , but i got 180Go with 120Go free, so dont speak about it anymore
finishing sonny 2 on hard will like take 2 hours if yo dont really rush. but at least you can save so you have neought time to finish all of sonny ^.^ *cough* PS3 sux *cough*
Some people who talk about flashes being a waste they're wrong, if it's a good game then it's worth it - If your favourate non-flash was an actual flash then you wouldn't like it - And Sonny does not take any space and it's still efficient (very) for as much space as it takes, GO KRIN!