LOL: "I downloaded it last night for a replay - so that I could just play a few levels here and there when I am in the mood. Made it to level 24 so far. wave"
That's what I was trying to do, a few levels here and there for filling in some time but I get sucked in!
That was very useful information you linked to, however, when I'm panicking in the game I don't remember what any of the stuff does except the hourglass and the hammer.
Level 30 is probably a piece of cake for you and I will get it eventually.
What I like though is that I keep getting more gold even though I fail the chapter. And I have no unemployed workers stealing it either.