...There's no strategy to this whatsoever. There are only a small number of fixed locations where you can place frogs, and once you've placed them all (which won't take very long), there's nothing else to do but watch and wait - no variation, no upgrades, no way to influence the outcome whatsoever. Unless I've missed something somehow, it's mathematically impossible to get past wave 14. There's an idea for a tower defense game here, but in execution, it's in its infancy. You could add some different kinds of frogs, some upgrades, some effects to influence how the food moves down the track, maybe different kinds of food with different behaviors. Also, test te game thoroughly to make sure that the goal is possible.