I ALMOST gave up because there were no controls. The title screen said to press "A", but "A" didn't actually do anything. After mashing at my keyboard for a while, it finally turned out that I had to press SPACE! WTF? After that, I had no idea what the controls were, so after dying a couple of times I finally pressed Backspace on the menu screen, like the submission information said. (Remember, the player SHOULD be able to play your game with everything IN the game; if they have to resort to reading the submission information, you already know you've done something wrong.)
Anyway, once I FINALLY was able to define my keys (oh, not anything as simple as seeing a LIST of keys, I had to go through and DEFINE them, EACH ONE of them) then I got to play. And...it was kinda fun. Still really didn't have anything in the way of instructions, but it was vaguely clear what I had to do. I still can't find the health meter, though, so I have no idea how many times I can get hit before game over.