diff --git a/assets/images/force.aseprite b/assets/images/force.aseprite
new file mode 100644
index 0000000..f4479cf
Binary files /dev/null and b/assets/images/force.aseprite differ
diff --git a/assets/images/force.png b/assets/images/force.png
new file mode 100644
index 0000000..594e7f4
Binary files /dev/null and b/assets/images/force.png differ
diff --git a/game/enemy/ai.rb b/game/enemy/ai.rb
index dacb1d4..59cf532 100644
--- a/game/enemy/ai.rb
+++ b/game/enemy/ai.rb
@@ -1,6 +1,6 @@
 class EnemyAI
   AGGRO_RADIUS = 2000
-  SPEED = 120.0
+  BASE_SPEED = 130.0
   CORNER_OFFSET = 35 # how far from tile center to place corner waypoint
 
   def initialize(enemy, type)
@@ -10,12 +10,28 @@ class EnemyAI
     @waypoints = []    # actual world positions to move through
     @last_player_tile = nil
     @avoiding_obstacle = false
+    @speed = BASE_SPEED
+    @lorentz_effect_active = false
+
+    $bus.on(:lorentz_field) do
+      @lorentz_effect_active = true
+    end
+
+    $bus.on(:lorentz_field_end) do
+      @lorentz_effect_active = false
+    end
   end
 
   def update(player_x, player_y, dt)
-    distance = Gosu.distance(@enemy.x, @enemy.y, player_x, player_y)
+    distance = Math.sqrt((player_x - @enemy.x)**2 + (player_y - @enemy.y)**2)
     return unless distance < AGGRO_RADIUS
 
+    if @lorentz_effect_active && distance < 230
+      @speed = BASE_SPEED * 0.3
+    else
+      @speed = BASE_SPEED
+    end
+
     player_tile = [(player_x - 90) / 120, (player_y - 90) / 120].map(&:round)
     enemy_tile  = [(@enemy.x - 90) / 120, (@enemy.y - 90) / 120].map(&:round)
 
@@ -135,8 +151,8 @@ class EnemyAI
 
   def move_towards(target_x, target_y, dt)
     angle = Gosu.angle(@enemy.x, @enemy.y, target_x, target_y)
-    dx = Gosu.offset_x(angle, SPEED * dt)
-    dy = Gosu.offset_y(angle, SPEED * dt)
+    dx = Gosu.offset_x(angle, @speed * dt)
+    dy = Gosu.offset_y(angle, @speed * dt)
 
     @enemy.x += dx
     @enemy.y += dy
diff --git a/game/enemy/base.rb b/game/enemy/base.rb
index 6e85c23..4ef1883 100644
--- a/game/enemy/base.rb
+++ b/game/enemy/base.rb
@@ -3,6 +3,23 @@ require_relative 'ai'
 class Enemy
   attr_accessor :x, :y, :w, :h
 
+  def self.load(path, w, h, s)
+    # Once artwork is done need to load each animation here.
+    # But as artwork takes time, for now just load a single image.
+    @sprite = Gosu::Image.new(path, retro: true)
+    @i_w = w
+    @i_h = h
+    @s = s
+  end
+
+  def self.sprite
+    @sprite
+  end
+
+  def self.frame_size
+    [@i_w, @i_h, @s]
+  end
+
   def initialize(x, y)
     @x = x
     @y = y
@@ -36,15 +53,17 @@ class Enemy
     screen_x = @x - cam_x
     screen_y = @y - cam_y
 
-    Gosu.draw_rect(
-      screen_x - @w / 2,
-      screen_y - @h / 2,
-      @w,
-      @h,
-      Gosu::Color::RED,
-      screen_y - @h / 2
+
+    self.class.sprite.draw(
+      screen_x - self.class.frame_size[0],
+      screen_y - self.class.frame_size[1],
+      screen_y - self.class.frame_size[1],
+      self.class.frame_size[2],
+      self.class.frame_size[2]
     )
 
+    Gosu.draw_rect(screen_x - @w / 2, screen_y - @h / 2, @w, @h, Gosu::Color.new(0x40FF0000), Float::INFINITY) if $bus.get(:settings, :debug)
+
     @ai.draw
   end
 end
\ No newline at end of file
diff --git a/game/enemy/force.rb b/game/enemy/force.rb
new file mode 100644
index 0000000..546245d
--- /dev/null
+++ b/game/enemy/force.rb
@@ -0,0 +1,11 @@
+require_relative 'base'
+
+class Force < Enemy
+  load 'assets/images/force.png', 21, 32, 1.7
+
+  def initialize(x, y)
+    super
+    @w = 20
+    @h = 20
+  end
+end
\ No newline at end of file
diff --git a/game/enemy/handler.rb b/game/enemy/handler.rb
index 13f211a..0e97375 100644
--- a/game/enemy/handler.rb
+++ b/game/enemy/handler.rb
@@ -1,4 +1,4 @@
-require_relative 'base'
+require_relative 'force'
 
 class EnemyHandler
   def initialize
@@ -14,7 +14,7 @@ class EnemyHandler
     # For now, just spawn a single enemy at a fixed location
     start_room_coords = $bus.get(:start_room_coords)
     if @enemies.empty?
-      @enemies << Enemy.new((start_room_coords[0] * 2 + 1 + 4) * 60 + 30, (start_room_coords[1] * 2 + 1 + 4) * 60 + 30)
+      @enemies << Force.new((start_room_coords[0] * 2 + 1 + 4) * 60 + 30, (start_room_coords[1] * 2 + 1 + 4) * 60 + 30)
     end
   end
 
diff --git a/game/weapons/lorentz_field.rb b/game/weapons/lorentz_field.rb
index cec3af1..3b757f0 100644
--- a/game/weapons/lorentz_field.rb
+++ b/game/weapons/lorentz_field.rb
@@ -32,6 +32,7 @@ class LorentzField
     $bus.emit(:consume, :lorentz_field, 1)
     @active = true
     @time = 0
+    $bus.emit(:lorentz_field)
   end
 
   def update(dt)
@@ -41,6 +42,7 @@ class LorentzField
     if @time >= BASE_TIME
       @time = 0
       @active = false
+      $bus.emit(:lorentz_field_end)
     end
   end