I have to say, I loved the first one. This one seems a little bit buggy, and eventually if I keep the right or left key held down, it lags my input so that if I stop pressing the key, it doesn't stop him moving... though, the way it's looking, that could be my computer at this point because it's doing that as I type.
I got stuck on mission 5 too on hard. I could never seem to get enough energy, the objectives of the level didn't match well with all the other things you're supposed to do to sustain yourself against the zombies.
Anywho, I'm wondering if we might be able to find the soundtrack anywhere? Somewhere? Sometime?