First commit.
Spawn a player and move it around.
Add CustomEvent polyfill.
Player digs dirt
Viewport follows player.  Player moves to box.
Get gold, get points.
Ring and pulse, distance and center stuff
Rings spawned by pulse when passing gold.
Make some noise!
Fixed a bug where you might not dig a whole path.
I should commit more often.

Fixes issues #1
Death doesn't suck. Sounds and volumes and whatnot.

Fixes issue #3
Get ready to pick levels.
Level select and quit.
It's committin' time again.
Add a tutorial.

Closes #6
Constrain viewport to game when that makes sense.

Prevent outside click.

Fix #10
Prevent water and gold from colocating.

Fix #4
Define Player.prototype.moving
Provide feedback when trying to move non-orthagonally.

Fixes #7