2DShooter

your proposed modifications sound okay, but there is not enough detail for us to provide feedback one way or the other for if they will be substantial enough to earn full points in the final submission. New enemies that behave differently will work for significance, a new obstacle in the form of a meteor could work but you should specify how this works in the game beyond just naming it with two words. The same applies for the planet change. In your final submission you should add more detail in your description so it is clear what you modified and designed for the modification.