Alien Invaders (Shoot-em up)

We were tasked on making a shoot em up game, and so I created a standard shoot em up with powerups and 2 different game modes.

Gameplay:

I wanted the boss in the game to have two different phases with it changing into a different phase at 50% or less hp. Which is why before he drops below 50% he shoots 2 homing bullets. But at less than that he shoots 5 in a row and spawns minions occasionally to help him.

Spawning code:

I wanted the spawn mobs to vary as well instead of limiting it to just one mob.

My mobs consists of 3 different enemies I had the basic enemy01 that only shoots bullets straight down

Enemy02 here shoots 1 slow homing bullet

Enemy03 is both Enemy02 and Enemy01 combined as they shoot both a slow homing bullet and a bullet straight down (don't underestimate the value of this bullet!)

Homing bullets code:

All homing bullets use the same code but fly towards the player at different speeds.