This is one of those game where you are like: Meh, alright, does not look like much, i am gonna play for a minute or so.... And you end up playing for an hour! :D Suprisingly fun, pretty difficult, i would say that buying health should be a bit cheaper on the long run, but maybe i am just not good enough :D
I really admire game devs who create a great atmosphere with just a couple of colors and pixels, really impessive! Good job!