; layer - can be foreground (drawn above player), interactive (interacts with player,
; (solid #t) has to be set, as well), background (drawn below the player).
; speed - this can be used for parallax effects. Better use a level editor (though
; layer - can be foreground (drawn above player), interactive (interacts with player,
; (solid #t) has to be set, as well), background (drawn below the player).
; speed - this can be used for parallax effects. Better use a level editor (though