This is pretty neat and also tricky, and a nice take on the theme.  I do like the aspect of having to remember whether you're supposed to win or lose.

Some things that I think could be improved:
• Better feedback about what happened when you lost (some sort of "game over" screen that lasts more than a few frames, and somehow indicates whether you were out of time or chose the wrong thing, and what you were supposed to do)
• I think maybe having the timer as a bar instead of a number would make it easier to tell at a glance how much time you have left.
• I was going to suggest maybe having a "Start" button instead of just starting immediately and running out of time until the player does something, but after thinking about it again, I think I might like it this way.

This broke my brain in a fun way. Would like to see a more clear indication of whether I should be winning or losing at any given moment. I found myself coming back to it several times though.

I love simple ideas ! Took me a bit of time to deduce the fact that you have to win and lose alternatively as fast as you can. Maybe the description of the game could be a bit clearer ? 

Once i understood though, it was quite fun ! I only got to 14 points. (My excuse is post-jam fatigue, okay ?)