It can spawn circles @ your mouse.
Controls, mouse, s key and d key to make the spawning faster/slower,
f and g key to adjust air friction,
q,w,e,r,z,x,c,v,b,n and m keys to change color.
It may be lousy as I'm only 10.
phun facts: How to calculate trajectory!!!
x axis: speed ( m/s ) * time ( seconds ) * cosine angle.
Y axis: ( speed ( m/s ) * time ( seconds ) * sine angle) - (half * gravity ( m/s^2 ) * time ( seconds ) squared.
I'm not learning this stuff yet
, but math and physics is my favorite subject!!!