FIX WHATEVER IS CAUSING OF THE CRASH!!!

I love the game, and really want to be able to play, but every time I play, after about 10-15 minutes, the game just disappears and all my accomplishments up to that point are gone.

At the very least, whenever a tower is upgraded, or at key points in the game, there should be a snapshot of the game in progress. This way, when the app is restarted, you can move along and progress further, until the next crash.

Its frustrating, because this is a really fun game, very addicting, and it keeps you on your toes. Trying to get away from the zombies, can at times be enough to raise your stress level ( but in a good way). I love the towers, and the upgrades that are available. Great sound effects! The characters could use a little bit of enhancement, but they are not bad other wise.

When the game is fixed, Ill raise it to a 4 star....

dna-franck about Zombie Attack! Second Wave XL, v2.1.0