An interesting post-apocalyptic timekiller called Nova Defense in which you have to defend the base from an impending threat. A horde of various monsters is approaching the gate directly. You have to appear as a hero in front of everyone by repelling their offensive. But remember with each wave they are getting stronger and their numbers are growing.
Therefore, it is important to first use special abilities that will help you quickly get rid of the horrifying creatures if there are so many of them that you cannot cope. Secondly, between waves, improve your character. This way, he will be able to deal with enemies with ease. And, by the way, by destroying enemies you earn just the coins which you have a chance to spend on upgrades.
Thirdly, you can improve the base itself. At the top is a weapon that helps you deal with the advancing monsters. This way you can make them much more powerful, so you can quickly and easily cope with each new stage.