good job :)
about characters: Robin from The Iconoclasts ^__^, Curly & Quote, madness guy, Pico, Alien Hominid, Isaac, Bit.Trip Runner, Rilo (?) from Noitu Love, Stellar Arms (maybe), uhm... some hero dude from Hero Core %), (?) some girl from Touhou Project, frog from Kero Blaster i presume (didn't play it yet) and some guy from Battle Block Theater (same) ....eh, that's all)