Earth Defender 1.1

Hey folks!

I've changed & added a few things to the game.

1.  Changed controls to W and S with LCLICK to shoot.

2. Made missiles go faster and spawn faster over time.

Alas, there are some bugs in this game.

Here are the ones I'm aware of:

1. Explosions keep moving instead of staying in place

2. The "You Lose!" box doesn't appear sometimes.

I'm gonna keep working to fix these issues. In the meantime, make sure to report any bugs that you find!