make it a bit less "hackish" by using actual Ellipse object for the collision test
make it a bit less "hackish" by using actual Ellipse object for the collision test

i don't even understand how it was working before, as Renderable objects
have no `radius` or any other ellipse specific properties defined

rlugojr/melonJS,melonjs/melonJS,rlugojr/melonJS,melonjs/melonJS,rlugojr/melonJS