maybe stale and inexistent chunks should be visualized (e.g. by
drawing a semi-transparent box around them)
+ make a chunk data counting a little safer
+
threading
(clientside) networking and disk IO are prime candidates for threading
now implemented as optional gravity emitter per block type
let's see how that pans out
+ maybe players should be given the option to switch between
+ walk and fly mode
block attributes
I don't like the force/spring based collision response, maybe revert
back to impulses
+ also, it fails in some cases
spawning