Thanks for the feedback on the sprites! I'll be working on them more, but I may be a little bit slower because my webcomic has been begging for attention.
I do have a few questions, though, about future graphics.
*Is there a semifunctional version of the game that I can look at to get an idea of where you are, and what you need other than character sprites?
*What about environments? Do you do one image, layered two-dimensional images, or tile-based maps? (or other?)
*Diagonal sprites. Do you need them? Could you use them?
*What dimensions should the sprites for the projectiles be?
*Are buttons separate graphics? For example, would the "Start Game" etc. buttons be integrated in the title screen image, or virtually laid on top of it?
*I've been assuming the imaginary camera angle is something in the area of top-down at roughly a 45-degree angle. (Think Pokemon) Is this right?
*Are Zombies melee?
I'm sure I'll think of more later. In the meantime I'll be working on idling plants and walking zombies. Maybe I'll smooth out the animation for the crawlers, too, just for the sake of options.
Fun fact: the severed arm in the zombie's hand was added to be used as a potential projectile, in case one was needed.