How can one run too fast? Speed is all that matters!!
On a more serious note, using SHIFT/A/RIGHT ARROW You can actually slow down. We took into consideration that the insane speeds are a bit absurd sometimes and makes for unavoidable damage. As for the differentiating zombies, what'd you mean? As in different models for the zombies, or making them stick out more as things you need to avoid? If the latter, we are already working on that.
I'm very glad with how our music turned out, the movement speed felt very clunky and hard to work with at first, but we designed the gameplay around it and it works surprisingly well. Differentiating the zombies and infected was a minor thing we noticed, but because we worked on the game a lot (and playtested a hell of a lot) this wasn't as hard for us as it is for others.
The game really did turn out to be a lot more addicting than we originally expected, personally I got kinda hooked on it for a few hours because I wanted to break the 40k points barrier (never made it :{). It's a very nice idea to make the screen shift to the right depending on speed, and will definitely be looked at if/when we come back to it. After the many hours of time we put into it however, and it being our first completed game, we decided to take a break from the game for a bit. The main thing I've personally been wanting to add is mobile (.apk) support, really think it could do well as a mobile game (especially with the very simple controls).
