Fixed bug where a couple of colors didn't have the # in front, which
caused bugs on some browsers.
Smoothed out some transitions between menus.
Made the boss two arms expand when he gets bigger, so that the boss isn't
trivial in Standard Mode.
Improved tutorial with more flashing arrows!

Also changed rating system so that it takes the larger of the rating
contributions for each level from the two difficulties and adds these all
together.
Spear now waits 500s upon entering stage before charging.

Now show boss hint arrow until boss is finally defeated.

Fixed bug where we updated the high score even though the player failed
the level.
Removed odd flicker in transition state when dying in boss level.

When dying in boss level, immediately restarts battle.
Enemies that boss one spawns now face the correct way.