Zombie Tsunami for android games

One of the missions that require you to play a Zombie Tsunami for android games game between certain times is not allowing me to progress any further in the When I play without WiFi works fine, but every time I try to play with it on, stay crashing and when it loads the game, I can't connect with my fb account. Help!  game even though I have played several games in a row and logged out and back in and can't get it achieved. What's going in?

 FEATURES
- Turn over cars, buses, vehicles and tanks to eat the survivors inside.
- 300+ different missions to devour.
- 9 worldwide locations to stampede your zombies through.
- Optimized for all models of Android smartphones
- Featuring Blast Processing
- Add as many zombies to your hoard as you can.
- Frantic flesh-eating fun for all the family!
- Keep going as long as at least one zombie is still running (and it doesn’t have to be the zombie you started with).
- Collect 8 different power-ups and bonuses to run further and destroy more.

REVIEWS
4.5/5 148Apps - "It’s fun madness, emphasis on fun."
5/5 iReviewT.com - "Revolutionary endless runner formula!"
5/5 TouchGen.net - "If you’re looking for a fantastic game, look no further!"
4.5/5 TouchArcade - "Zombie Tsunami is a game you really need to own"
5/5 AppSmile - "Featuring Pixar-like graphics, simple controls, and plenty of content"

It is a great game, i enjoyed the speed changes and the free tickets i recieve every level, which is kind of helpful but in fact, Where is this mega update that is being talked about. Very fun game, but needs some evolution. Not asking for a ton of new things, but a little would be nice, to bring it back to five stars.  it owns the same routine, which made the game so boring as u are doing the same thing everytime