Hold "S" to show Store, and use the mouse to dismiss a soldier. DISCLAIMER: It gets easy until you get the jar of honey. The actual run starts as soon as you have everything maxed out.
This was made for a contest with @TornadomasterT to see who could make the best Tower Defense Game. I won. Once I become an official Scratcher, high scores will be recorded. Doggy's Tower Defense II will come soon.