Block appears to break down after around world 9, right now I'm at 11 and out of the 300 billion damage they deal to me I block 200m, and thats with 300 trainers.
The cost of diamonds is broken if you go over 2147483647 the cost turns to 0 and then starts over again, and if you try to buy more than that often you get less.
you should be able to switch while reloading, even if it restarted the reload progress, its very frustrating to accidentally trigger a reload, then have to wait for it to happen, especially when you have someone with you to reload.
the sauce boost should not stop your upward momentum, its constantly killing my specials, clicking for the ketchup to get up then one extra click flattens you out. or if you are boosting and hit a beer, you get no bounce from it. very frustrating.
The only problem i have with this game is that sending everything to front includes the hero, late game the hero sucks. He gets killed in one hit, if for some reason you send everyone forward and forget to send him back you lose, and without warning. very frustrating, and the only thing keeping it a 5/5 for me.
On the later levels I can more than double the amount of money I get my removing 2-3 penguins from my team and not beating the level. Picking up money is way to hard in later levels. its the only reason I didn't give this game 5 stars.