gun phase in player fixed

upgrade gun system added

enemy 3 stops looking at player when shooting lasers

fixed game round bugs, enemy 2, 3, and boss gives more score

added game rounds

made the "debug enemies" text invisible

restored the duration of enemies spawning, making the game easier

more bug fixes

fixed scoring bugs

added an hp restorer that can be spawned every 15-30 seconds

removed the testing laser enemy

added a laser enemy (aka enemy 3)