possible expansion?

i think the idea of single player was good but what if instead there was an expansion on that idea and implemented something like a wave defence for people and their would be a reward after every wave they surpassed maybe up to 50-100 waves all you would need to do is watch and see if your base defences could survive wave after wave i have two possible ways the wave system could work.

first option the base heals after every attack to max health there would be 100 waves for this

second option is that the base heals 10-25% of its current health after every wave but only has a maximum of 50 waves