+ wip - tile_lock hops and falls when unlocked

~~ unrender the lock sprite when it's off-screen
~ hacky fix: when the default animation is set
to end, it forces a stop the loop after

! pretty effects
! tile_key
! passive: shines nicely
! collected: disappears quickly

! tile_lock
+~~ unlocked: hops and falls
! tile explodes in a puff of smoke