For people who cant run under the zombie, just wait until your acceleration and running speed are full. It's easy after that. If you still cant do it, just wait till one gets really close. If it doesnt jump, shoot it. If it does, sprint.
For some reason, on one of the swimming challenges, I cant do it. My duck automatically floats to the top and crashes in to the wall, about a second in.
I think their should be like 5 objectives, and you only have to get 3. I really struggle with getting the bonus bubbles, but I can build really high towers. If I didn't have to get bubbles every time, it would really help.
Mine freezes up 1-5 times a song. The music keeps playing, but the game doesn't. It can really frustrate you when their will be about 5 seconds left to a song than it freezes up. It will eventually unfreeze, but you'll be dead.
I already posted a comment with some suggestions, and had another. Maybe their should be a queue of things to do. Say you wanted to upgrade all four of your Silo's and had two workers. I think you should set it so after the two upgrades are done, the workers will go and upgrade the other two. This would make a lot more work done while you are off line. [+] if you agree.
Quite addicting, although i do agree with the overpriced shiny. A few suggestions would be to:
1) Allow multiple workers to work on one project, and increase the speed.
2) Have more ways to earn shiny, such as destroying an enemies town hall.
3) Have an alternative way of buying stuff that you pay for with shiny. Like you could buy an extra worker for so many resources.
Other than that, I like this game. If anyone agrees with what I said, give this a [+] so it can be seen by the developers.