Interstellar Tower Defense, What Kind of Gouba Defense Tower Am I?

Countless portals are falling from the sky, and Blue Star is being invaded by an unknown civilization! Commander: We are unprepared for this wave of monster invasion. We are careless and prepare to retreat! Cheng Chi: Don't leave in a hurry, I'll throw in a defensive NPC. There was a flash of white light, and then a trainee in a white shirt and overalls appeared in front of everyone. Chief: What time has it been? If you still want to joke, get out! Cheng Chi: "Don't worry." After that, he threw a basketball to the trainee. The trainee took action, with a beautiful parabola, and the mighty alien army was instantly crushed to dust by the shock wave! The whole world is shocked. You call this a defense tower? There are hundreds of millions of bits and pieces of nonsense, right? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.