Impossible Glitch Ultimate (2010)

This is an old game I made in 2010. I was about 10-11 years old at the time. It was made in the Game Maker Engine. It is quite terrible, but it has sentimental value to me. 

Controls:

Move Player: Holding the Up button makes you move towards the direction of the cursor

Shoot: Left Mouse Button

Move Spider Drone: Typical WASD controls

Soft lock warning:

There is a potential soft lock in this level. Make sure not to kill the zombie shooting the green goop at you until he has destroyed the black blocks blocking the way.