v0.4.1: A few minor things

Tweaking some knobs on here

1. The shield sprite on top of the ship when it's shielded is now 50% larger. Ethan asked for it to be more apparent and I have delivered. Never let it be said that I am unresponsive to my players' requests.
2. I have increased the speed of every projectile in the game by 25%. I would like to force the player to dodge a little bit more. It is still generally true, but it used to be more true, that once the player had a certain amount of movespeed they could simply circle-strafe through everything and never get hit. Bad gameplay.

I am looking into the boss scaling. It is pretty silly that the Round 20 boss is identical in every way to the Round 10 boss.