Also, when adding an element to a tower, why not add a pop-up that tells what combination the tower will be after adding the element you're mousing over?
a) clicking on enemies is incredibly hard at higher speeds.
b) How about a pie chart countdown timer somewhere to tell you when your next cake will drop?
On level 10, I need to finish with *at least* 38 cakes. Even at max production, cake production is only high enough to replace occasional leaks, so I can only sell 12 cakes, as opposed to the 30 I usually sell. That's only an extra 300, meaning I could get, what? One level two tower?
How about some tips on dealing with the earth effect immune sharks?
 "Cake Pirate"){kind=icon}
 "Frantic 2"){kind=icon}
 "Heavy Weapons"){kind=icon}