Small Procedures for Foundation Elimination of Enemy Aircraft

This is the beginning. Compare dishes. Of course, I'm also a vegetable now... emmmm, used purely as a record.
Functions: 1. Eliminate enemy aircraft
2. Slow down
Implemented functions: a bunch, not listed
Disadvantages: 1. Interface scintillation
2 Unhidden cursor
Tips: 1. You can use delay and for loops to slow down the pause rate.

//Simple Elimination of Aircraft Games

#include<stdio.h>
#Include <stdlib.h>//Screen Clearing
#Include <conio.h>//No return is required
#Include <windows.h>// Slowly move, set pause


int main()
{

	int i, j;
	int x=5, y=0;
	char input;
	int isfiled = 0;
	int iskilled = 0;                        
	int score = 0;                           //Calculated fraction
	
	srand(time(0));
    int nx = rand() % 40 + 4;               //Setting Random Number to Get Moving Target
	int ny = rand() % 40 + 4;
	                     
		while (1)
	{
		system("CLS");                      //Clean screen
		
		if (!iskilled)                      //If hit, the target disappears.
		{   
			for (i = 0; i < ny; i++)
				printf("\n");
			for (j = 0; j < nx; j++)        //Output Targets Using Random Numbers
				printf(" ");
			printf("+\n");

		}
		else 
		{
			Sleep(20);
			for (j = 0; j < nx; j++)        //Output Targets Using Random Numbers
				printf(" ");
			printf("+\n");
		}

		if (isfiled)
		{
                for (i = 0; i < y; i++)     //Output Bullet, Output Bullet if Input Space Key, Output Bullet if Input Space Key, Output Bullet if Input Space Key
               {
				for (j = 0; j < x; j++)
					printf(" ");
				printf("  |\n");
				if (x + 2 == nx)           //Judge whether or not you hit the target
				{
					iskilled = 1;
					score++;
					nx = rand() % 40 + 4;
					ny = rand() % 40 + 4;
				}
					
			   isfiled = 0;
  			   }
		}
		else {
			for (i = 0; i < y; i++)
				printf("\n");
			}

		for (j = 0; j < x; j++)       		//Output of a small aircraft
            printf(" ");
		printf("  *\n");
		for (j = 0; j < x; j++)
			printf(" ");
		printf("*****\n");
		for (j = 0; j < x; j++)
			printf(" ");
		printf(" * *\n");

        //Scanf_s("% c", & input, 1);//input wasd to control the up and down movement of the small aircraft
		input = _getch();
		if (input == 'a')
			x--;
		if (input == 'd')
			x++;
		if (input == 'w')
			y--;
		if (input == 's')
			y++;

		if (input == ' ')                //Bullet Launching Through Space Keys
			isfiled = 1;

		printf("score:%d", score);


	}

	system("pause");
	return 0;


}