Tweaks to World 2.

2-3 required some major reworking so it wouldn't be too hard, too easy, or
too boring. Shrunk the map so killing spears is easier. Made it easier to move within goo.
Made earlier levels of world 2 scale less.

Made later levels slightly easier but increased score, to encourage
keeping multipliers.
Tweaked boss 2 forces slightly. Worried boss 2 is too hard on easy mode.

Boss two spawners no longer spawn overlapping enemies.
Re-worked boss 2.

Boss 2's gravity on enemies is lowered to allow for more counterplay.

Boss's black hole has been buffed.

Boss now has 4 spawners. Each one spawns less enemies than in easy mode.

Seems very balanced right now.
The enemies that boss one spawns are now invincible until they become
alive.
Small cosmetic adjustments to Boss 2.
Reworked boss one.

Enemies have been made invincible when spawning.

Turret firing period is much shorter and boss spawns enemies more quickly.

Lightening period is shorter. Enemies are easier to impulse during
lightening period.

Focus is on balancing killing enemies with killing boss while keeping
aware of certain mortal perils (such as being near the boss when the
downsizing happens). Boss punches while downsized are 1 hit KO.
Minified JS.