Good idea, but needs tweaking a bit. As previously stated it's impossible to encircle anything when the snake gets down to being 3 or 4 circles in size. Making the game move a little slower might also help make the controls easier to manage.
The gameplay for this needs a serious overhaul. There's no point in moving as you can just sit there and hold Ctrl, and even then you can't kill a zombie without taking damage.
This game is surprisingly better than I had expected it to be. Easily my favorite part is that you're likely to have access to all the same cards as your opponent, making it come down to pure strategy. Though I do have an issue with some of the status effects, specifically poison. I had an enemy under the effect of 6 different poison effects. They died after the second one hit them, but the other 4 still showed their damage after the enemy had vanished. Kind of annoying having to wait for a dead enemy to finish taking all that extra damage.
I'd probably recommend changing the default controls so that W is jump and S is crouch. I know that you can always change it, but people tend to either not know or not care.
2/5 The idea could be interesting, but this game is far from complete. The game doesn't end when the ball disappears completely. The score never stops changing, maybe make it so there's another spot where it keeps track of the highest score you've gotten in the round? You also should add something to make the game interesting, maybe make it so the ball you're trying to grow moves around or shrinks faster as time goes by? Oh, and a mute button. :P
Desperately needs to have the creeps follow a set path. I tried starting with two fire towers and the creeps went around the edge of the screen. It would also be nice if you told us that we could rotate and zoom on the screen.
For anyone who can't figure out the little happy meter, it looks like it goes down based on how many flowers end up leaving the screen while they still have attack power left. You want to keep your flowers attacking until they die off, that'll keep the meter up.