Thanks for the message! I thought it would be really hard. I'm so glad I was able to get into this amazing game. This is the best Pixel Day ever! You don't press "Tab", you just click space over and over at that part. I hope that clears it up for everyone.
I wasn't expecting it to be so creative with these zombies. Damn it, if there weren't more of these submissions, this would have gotten Daily Feature! It deserves its high score. It isn't until you open the door that it really gets amazing. I guess a guy with a skull head would be a good match against zombies. Happy Amazing Pixel Day now and forever!