Drone Invaders kinda works, can't tell because of slow school computer.

Turtle/Drone Invaders/bomb.py

@@ -28,15 +28,16 @@ class Bomb(BoundedTurtle):
         self.scoreboard = scoreboard
 
     def move(self):
-        self.forward(self.get_speed())
+        self.forward(0.1)
+        if self.out_of_bounds():
+            self.remove()
         for drone in Drone.get_drones():
             if self.distance(drone) < self.get_speed() and self.isvisible():
                 drone.remove()
                 self.remove()
                 Audio.play_explosion_sound()
                 self.scoreboard.increment(4)
-            else:
-                self.getscreen().ontimer(self.move, 100)
+        self.getscreen().ontimer(self.move, 100)
 
     def distance(self, other):
         p1 = self.position()
@@ -44,5 +45,6 @@ class Bomb(BoundedTurtle):
         return math.dist(p1, p2)
 
     def remove(self):
-        self.clear()
         self.hideturtle()
+        self.penup()
+        self.clear()

Turtle/Drone Invaders/drone.py

@@ -24,7 +24,7 @@ class Drone(BoundedTurtle):
         self.shape('images/Drone64.gif')
         self.resizemode('user')
         self.turtlesize(10, 10, 1)
-        x = random.uniform(x_min * 0.1, x_max * 0.1)
+        x = random.uniform(x_min * 0.9, x_max * 0.9)
         self.goto(x, y_max * 1.1)
         self.setheading(270)
         self.getscreen().tracer(True)