Wow. I do not usually comment on games, but this was pretty awesome. Thank you for Ink's secret (there was quite a bit of foreshadowing for that), and I am looking forward to the next part. (Also, I am curious to see what exactly is up with Liza, although I got the general gist.)
The explore mode does not prevent me of running into poison gas from a Zombie Bloat despite doing this for every other kind of dangerous terrain. I just died from this. Please fix.
I refused to press the button right from the start and pressed the button to open the door instead, but apparently that gets treated as pressing the red button...
There's a way to do lvl 35 with one shot less than described. Shoot the glass that is right above you while the first zombie is on the left half of it. He will walk into the flames, but the girl will just go down to you. Proceed as described in the solution.
My main concern with the game is that it doesn't pause on mouseout, which is annonying a) because of the time still running and b) because when clicking back, the guy shoots automatically, which loses me a bullet.
I think it's rather good that you have to restart at tier 18. Otherwise, you don't have enough ammo for tier 21 (I had about 4 ammo left). And then you'd be complaining that you don't know what tier to restart on so that you have enpugh ammo.
fixed