Streamlined Health UI - Super Gamera Attack

Here is an idea David, Logan and I had during the playtest today (as a team we've kicked very similar ideas around before). It is supposed to make the health UI more readable. The change would also make the game a little harder because you can only get hit twice before you die (right now you die after getting hit three times when you have max health). Instead of a third health state, we could have a super attack. If the player is at max health and if they collect enough buildings, then the shell in the corner turns purple. Once it turns purple, the next time the player taps anywhere on screen, the Kaiju rampages super gamera attacks (looping around the entire kazoo in half a second).

What do you guys think?