To clarify most of the controls
A & D = Move left and right Respectevily
Space = jump
Mouse left = Shoot (While in place mode = place turret)
Q = Toggle Turret placing mode
O = Make the window bigger
F11 = Toggle fullscreen
Hud
White numbers (top left) = HP
Green number (top left) = Tower hp
Aqua number (top right) = Energy
Blue number (bellow energy) = Turrets Cost