It's an innovative concept, the one button game, but I have to say I didn't like the execution in this case.
Wouldn't a character in this game's situation want to run? I appreciate the deliberate slowness of the game, but with the rate I was taping space I should have seen some sprinting to save the day, not a leisurely stroll. And if there's really no reward or alternate ending then why did I bother to rush at all?
I liked the large pixel graphics and I liked the music as well, but if you could think of a way to make the player's input more significant, to make the player feel like they made a difference instead of just watching in slow motion, that would help a lot!
Hope to see more of your work in the future!