Yeah, it's too hard
I still like it, but the difficulty of this game is near absurd. The upgrades cost too much, there's too few of them, and they do damn near nothing even when upgraded (especially the Cure attack). The music is very appropriate though, sets a sort of "Doomsday" atmosphere, like the last one. I like it. =)
And BonusStage, you're just being a pretentious dick because online games are the only part of your life where you can feel like you're better at something than other people. Calm the fuck down; if people don't like this game, let them think so, you fucking ideological Hitler. Don't be such a pansy.
But yeah. This game was alright, but I would've liked more options, like the last one, and some actual animation. I understand the style you're going for, but typically, less animation = less entertainment. I'm not saying throw in full-blown cutscenes, but little things, like showing the airplanes flying or the virus spreading through a country would certainly grab my attention more than a brown blob. And maybe some more creative newsfeeds with emotion. If an entire continent is wiped out, I do believe there'd be a panicky tone in what the news says.
Just try not to be so rigid in your style. I'm looking forward to more, regardless.