Pixel positioned sprites

Some sprites in the game have alternate versions that allow pixel positioning instead of just tile positioning.

Goomba

Normal goomba: 0 72 x y

Pixel-positioned sprite: 1 1d x y <sprite-id> px

The sprite-id byte determines the enemy the sprite uses (0 is a Goomba, 1 is a Buzzy Beetle, 2 is a green Koopa Troopa, 3 is a red Koopa Troopa, etc.).

1 1d x y 0 px will place a goomba at tile (x,y), but then offset it horizontally in pixels by px. It is not possible to offset vertically using this sprite.

negative and positive pixel offsets

if the pixel offset value is 127 or lower, it will offset the entity to the right by that much

if the value is 128-254, it will offset the entity to the left by (256 - px), ie it's a signed byte