Great idea for an idle clicker / defense game :)
good simple graphics and music.
What about the light/dark theme though?
the actual game play could use some juicing up, i understand you probably didnt have time for it but when u click on the guard nothing really happens, u dont see a guard being created it just suddenly appears after quite some time.
if this is your first game created you should defiantly juice it up! lots of potential here!