Add prize boolean.

src/Bullet.java

+import java.awt.geom.Ellipse2D;
+import java.awt.image.BufferedImage;
+
+public class Bullet {
+
+    int x;
+    int y;
+    double rotateAmountBullet;
+    int damage;
+    boolean alive;
+
+
+    public Bullet(int x, int y, double rotateAmountBullet, int damage) {
+        this.x = x;
+        this.y = y;
+        this.rotateAmountBullet = rotateAmountBullet;
+        this.damage = damage;
+        alive=true;
+    }
+
+
+}
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