Those big black metal boxes!

RTM

I am on level 389 and I dislike immensely those big black metal boxes the pets stand or land on and the wooden/metal boxes the pets fall into that take forever to get them out of. Why aren't there special boosters for those boxes?! (Other than the ones we already have)

KingsPinn

I like the idea of a 'destroy all boxes' booster, haha. I guess the higher the levels go the more obstacles will be created to make the levels more tricky to pass.