Hey thanks for playing! I spent most of my time creating basic spawning systems for enemies and world chunks and ending animations :D
Biggest issue was designing them, other than that it's pretty much just a bunch of circle sprites from one of the kenney pack with black material, shockwaves are line2d's expanding to the size depending on your power and earthquake lines are essentially line2d's with semi random coordinates :D
Main thing i struggled with was keeping the scope managable, and ensuring everything semi works :D