I finished the game before the game changing updates, when the first update, which introduced the Gargantuars, was released I was able to play all the 3 gargantuar levels right away. After the latest update, which introduced the dr. Zomboss levels, I see the levels in all the worlds, but am able to play only the Egypt one. I finished it, yet I'm still unable to play the Pirate and Wild West dr. Zomboss levels.
How do I open those levels?