Really nice.
Ok... so I got three of the "indie" characters, and I'm wondering if there's more (I don't want to ruin them for the people who didn't get them yet). Two are really easy to make, but hard to realize unless you REALLY are into the indie games.
I'll give a hint, one had a game that made it out onto PS2, and was remade for the 360... Another was just recently released for 360... and the last is just hard to remember, even though the game was really awesome.
Anyway...if those are the only three, then it would have been cool to make two packs, one for beating the game normally, then another for beating it along with the new "indy" pack, and then unlock maybe some outfits for some Newgrounds exclusives... like Me from Dad N' Me, Pico, a Tankman... or more outfits for more obscure characters like Bubsy, Vectorman, Boogerman, John Madden (just for a laugh)... or how about other well known characters that were somehow forgotten this time around, like Scorpion, Raiden, Frank West (Dead Rising), Altair (Assassin's Creed)...
Or maybe characters from games made from popular things? Like Goku, Superman, Batman, Naruto, The Rock, Hulk Hogan, Harvey Birdman...
Anyway, the timed mode was wonderful. The only things that took from my scoring, AND I hated, was the fact that sometimes things started off outside of the box, or just grazing the edge so I couldn't grab it (most common here was Gordon's glasses, Pikachu's face pieces, and Kratos' goatee)... and the fact that some pieces seemed like they could fit two characters, but obviously didn't (like Snake's facial hair could have also fit Gordon Freeman if you didn't figure it out...)
In the end, though.... this was a solid mini-game, and it was fun. Good work. I'm giving a 9/10, though in reality it'd be an 8.5/10... so you gain the betterment of rounding up.