here are some optimizations not yet done.
-- better static inlining of fill. can bake in __pix8scale and the colour in most cases.
-- most instances of pulp.X can become just X if we make X local. In particular, pulp.player.
here is some incorrect behaviour:
these functions seemingly only execute their block once, not once per tile. They even execute the block if the tile does not exist. Also, they read new value of event.px/event.py/event.x/event.y if it changes.
tell "tile" to
tell tile-id to