This project took a little longer, due to Unity just deciding to ignore half the script with no way to fix this issue. After recoding the entire game, it does now respawn an enemy each time one is destroyed. You can shoot, the enemies and they are destroyed upon impact and a new enemy is spawned upon the death of the previous one. I chose to upload my own sprites into the game, I did however not create them myself I found remade sprites on the internet. I also changed the background to a galactic purple colour, to give the game move of a space feel.
link to game: https://ezrahhjay.itch.io/space-invaders