Nice game so far, made it to level 6 really fast but than on level 6 it took forever since the yellow kingdom took forever to take down, it is great when a starter level makes you stop and think about where to plan your buildings
A good tip is to not buy any of the "attack" items. There is no need to get buy them. It just makes you waste money since you can just buy the "speed" and "power" upgrade lines. Than skip to the drill and watch the how fast you can break the tower.
There have been a lot of suggestions on how to make the upgrades better so here is mine. Have one upgrade button for each thing and when you buy the upgrade make the button turn a different colour (In a way it is a ranking system). So you don't have to scroll as much. Rank 1: Bronze, Rank 2: Silver, Rank 3: Gold Rank 4: Platinum.
On the upgrade screen the zombie unlock says it is speedy and the speedy unlock says it is zombie, but on the power ups it is normal. Great 4/5 so far I only played 5 levels so far
Last car, no weapon, no boost, and no gas, but it is 20 ft away from the helicopter. Driver: "Damn so close might as well go back to the safe house that is 3000ft from here."
here is a tip for racing only enter one bug and make sure it is faster than one of them. You only have to get that bug to the end, and the competitor has to get get both bugs to the end.