The shark should get a time machine on mars that allows him to return to earth and attack Tokyo. You can't have a game about a bloodthirsty monster without attacking Tokyo.
Needs a 'charge' button to send the troops off the walls, making them less resistant to damage, but allowing them to hunt down that one remaining sniper picking off your walls. That and the easy levels need to be easier, been playing for hours and still haven't managed to beat one. Problem may be solved by making foes drop more money.
 "New York Shark"){kind=icon}
 "Master of Fortresses"){kind=icon}
 "Tower of Greed"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Clockwords: Prelude"){kind=icon}
 "Robot Dinosaurs That Shoot Beams When They Roar"){kind=icon}
 "CycloManiacs"){kind=icon}