This game surprised me a lot. The music and art at first glance were off putting, and I was expecting a boring, upsetting and confusing game. But, after reading the controls and messing around a bit, I discovered that this game has some VERY cool mechanics! Balancing whether to use your bullet to make yourself into a stepping stone or to clear the path for your next character was very fun, and making sure there weren't too many zombies was great!
You should take the time to rebuild this from the ground up and make a truly good game. With polish, this could be awesome!