Boss Fight Brainstorming
Idea 1
Swarms of Gargantuan Asteroids.
Idea 2
Alien space ships that move slowly towards the player. They have two letters written on them. For example - AG. To defeat the space ship players will have to type ABCDEFG without making any mistakes.
Idea 3
Fast Survival mode - Swarms of comets where the difficulty and speed of the comets keeps rising and the player will eventually die but they need to survive a minimum amount of time (example - 1 minute) to clear the level