I've really enjoyed playing, but I'm confused about how I get the reward or bonus rounds?

I've played through several times, I even left it running in the background once and I still haven't encountered any of them?

What am I missing?


If you give in and press space during any round you will ...

I've really enjoyed playing, but I'm confused about how I get the reward or bonus rounds?

I've played through several times, I even left it running in the background once and I still haven't encountered any of them?

What am I missing?