sound:
~~~~~~
click on jump
click on bump head
fancier PC-style sounds

movement:
~~~~~~~~~
collision detection up (hit head on jump)
only jump if feet on ground
when land from jump, stop walking
jump slightly higher?

levels:
~~~~~~~
mystery level 2

status:
~~~~~~~
keep score, proper laser count

sprites:
~~~~~~~~
Different sprites for left, right, shooting
When land, kicks up dust

enemies:
~~~~~~~~
Little robot
green crawly

items:
~~~~~~
red/blue key inverse-R