Pew, Pew, Pow!

Some of the changes

- Created two new levels

- Changed how the player shoots to one shoot by click without holding.

- Incorporated a new Projectile for player each third shoot called Super Projectile. This projectile can destroy enemies' projectiles.

- Created some new enemies derived from existing ones, like horizontal scrollers enemies, also implemented logic for them to collide or not with environment and destroy if beyond camera.

- Created new spawner for those new enemies.

- Created new enemy called "Green Chaser Enemy" which can only be killed with Super Projectile.

- Added current lives to Ingame-UI

-Added retry button to game over page

Cheems just because I found it while working and liked it.

Created by: Raul Alcantara

Cheems created by: Misa-Kingo