YET ANOTHER update.
Biggest changes are
-adding the climbing animation. The animations are mostly done now, though I need to tweak things a little - the climbing animation is a little goofy when you start with your left hand up.
-major cleanup on the kernel. This is very close to being complete. Enemies no longer jump around when the screen is scrolling and there are many fewer graphic glitches at the top and bottom of the scroll area.
EDIT: Just glanced at the screenshot I took for this post and noticed a graphic glitch in the player!