Consolidate hitBall() and throwBall() into one function.
Pull playerImage into its own "blipper" in utils.lua. This is definitely overkill, but we're learning with Lua, and it's fine, and it's very fine.
Also, patch up hit-detection logic!
Switch from D-Pad controlling hitMult to controlling player position.
This commit keeps a bunch of cruft, in case I messed something up.
The next commit will remove it.