Not my greatest work, but my first step into a more strategy game.
Controls: arrow keys to move around, 1-2-3-4 to select tower builds, click to build, click to get information on a build tower, ESC to cancel any selection.
There are 10 levels to finish, build a diversity of towers to try and win! Unfortunately, no end screen; it only tells you when you lose... Sorry!
Different designs for the towers would have been nice, but it is functional as it is.