Added WSAD controls and bonus blocks

Updated the game, adding WSAD controls, and bonus blocks to pick up.

Bonus blocks will drop after a certain amount of points scored/ after killing an amount of enemies.

When picked up, you get bonus points, but also increase a multiplier. The multiplier will increase the amount of points for the next bonus block! beware though, if you get damage on your ship, the multiplier will reset.

Good luck pilots!