If bubbles drop too far, fade to grey and game over

main.lua

@@ -301,6 +301,8 @@ function love.load(arg)
   game.score_font = love.graphics.setNewFont(50)
   game.points_font = love.graphics.newFont(30)
 
+  game.game_over = false
+  game.fade_to_grey_tween = {p = 1.0}
   game.paused = false
   game.frame_by_frame = false
 
@@ -404,10 +406,34 @@ function love.load(arg)
 
   game.bursting_bubbles = {}
   game.falling_bubbles = {}
+
+  game.shader = love.graphics.newShader [[
+    uniform float progress;
+    vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords)
+    {
+      vec4 pixel = Texel(texture, texture_coords);
+      number average = (pixel.r + pixel.b + pixel.g) / 3.0;
+      pixel.r = pixel.r + (average-pixel.r) * progress;
+      pixel.g = pixel.g + (average-pixel.g) * progress;
+      pixel.b = pixel.b + (average-pixel.b) * progress;
+      return pixel;
+    }
+  ]]
 end
 
 function love.update(dt)
-  if game.paused then
+  if game.game_over and game.fade_to_grey_tween.p < 1.0 then
+    game.fade_to_grey_tween.t = game.fade_to_grey_tween.t + 1
+    game.fade_to_grey_tween.p = easing.linear(
+      game.fade_to_grey_tween.t,
+      game.fade_to_grey_tween.b,
+      game.fade_to_grey_tween.c,
+      game.fade_to_grey_tween.d
+    )
+    game.shader:send("progress", game.fade_to_grey_tween.p)
+  end
+
+  if game.paused or game.game_over then
     return
   end
 
@@ -439,8 +465,17 @@ function love.update(dt)
       game.ceiling_drop_tween.c,
       game.ceiling_drop_tween.d
     )
+    local diff_y = game.ceiling_bottom - old_y
     for i = 1, #game.bubble_slots do
-      game.bubble_slots[i].y = game.bubble_slots[i].y + (game.ceiling_bottom - old_y)
+      game.bubble_slots[i].y = game.bubble_slots[i].y + diff_y
+      if game.bubble_slots[i].bubble_type ~= 0 and
+         game.bubble_slots[i].y > game.level_bottom then
+        game.game_over = true
+        game.fade_to_grey_tween = {t = 0, d = 120, b = 0, c = 1, p = 0.0}
+      end
+    end
+    if game.game_over then
+      return
     end
     if game.ceiling_drop_tween.t == game.ceiling_drop_tween.d then
       game.ceiling_drop_tween = nil
@@ -472,11 +507,18 @@ function love.update(dt)
           t = 0,
           d = 30,
           b = game.ceiling_bottom,
-          c = game.bubble_diameter
+          c = game.row_gap
         }
       end
 
       local matches = find_matches(movement_info.nearest_slot_index)
+
+      if #matches < 3 and game.next_bubble.y > game.level_bottom then
+        game.game_over = true
+        game.fade_to_grey_tween = {t = 0, d = 120, b = 0, c = 1, p = 0.0}
+        return
+      end
+
       if #matches >= 3 then
         game.next_bubble = nil
 
@@ -718,6 +760,19 @@ function love.draw(alpha)
     end
   end
 
+  -- draw aim guide
+  if game.show_aim_guide then
+    love.graphics.setColor(0, 0, 0, 1)
+    for i = 1, #game.aim_guide - 1 do
+      love.graphics.circle(
+        'line',
+        game.aim_guide[i].x,
+        game.aim_guide[i].y,
+        game.aim_guide[i].radius
+      )
+    end
+  end
+
   -- draw next bubble
   -- if moving, extrapolate position based on alpha value from love.run
   if game.next_bubble then
@@ -734,6 +789,10 @@ function love.draw(alpha)
     )
   end
 
+  if game.game_over then
+    love.graphics.setShader()
+  end
+
   -- draw score
   love.graphics.setFont(game.score_font)
   love.graphics.setColor(0, 0, 0, 1)
@@ -754,22 +813,32 @@ function love.draw(alpha)
     )
   end
 
-  -- draw aim guide
-  if game.show_aim_guide then
-    love.graphics.setColor(0, 0, 0, 1)
-    for i = 1, #game.aim_guide - 1 do
-      love.graphics.circle(
-        'line',
-        game.aim_guide[i].x,
-        game.aim_guide[i].y,
-        game.aim_guide[i].radius
+  -- draw game over
+  if game.game_over and game.fade_to_grey_tween.p == 1.0 then
+    love.graphics.setColor(0, 0, 0, 0.8)
+    love.graphics.rectangle(
+      'fill',
+      game.level_left + game.bubble_diameter,
+      game.window_height / 2 - 80,
+      game.level_width - game.bubble_diameter * 2,
+      160,
+      20,
+      20
+    )
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.printf(
+      'YOU LOSE',
+      game.level_left,
+      game.window_height / 2 - 30,
+      game.level_width,
+      'center'
     )
   end
-  end
+
 end
 
 function love.mousepressed(x, y, button, is_touch, presses)
-  if button == 1 and game.next_bubble and
+  if not game.game_over and button == 1 and game.next_bubble and
      game.next_bubble.x == game.launcher_x and
      game.next_bubble.y == game.launcher_y and
      game.next_bubble.velocity_x == 0 and
@@ -777,6 +846,8 @@ function love.mousepressed(x, y, button, is_touch, presses)
     local diff_x = x - game.launcher_x
     local diff_y = y - game.launcher_y
     local dist = math.sqrt(diff_x * diff_x + diff_y * diff_y)
+    -- TODO: don't allow shooting backwards
+
     game.next_bubble.velocity_x = diff_x / dist * game.bubble_speed
     game.next_bubble.velocity_y = diff_y / dist * game.bubble_speed
 
@@ -790,13 +861,18 @@ function love.mousepressed(x, y, button, is_touch, presses)
 end
 
 function love.mousemoved(x, y, dx, dy, is_touch)
+  if not game.game_over then
     local diff_x = x - game.launcher_x
     local diff_y = y - game.launcher_y
-  game.launcher_rotation = math.atan2(diff_y, diff_x)
+    local rotation = math.atan2(diff_y, diff_x)
+    if rotation >= -tau * 7 / 16 and rotation <= -tau / 16 then
+      game.launcher_rotation = rotation
+    end
 
     if game.show_aim_guide then
       generate_aim_guide(x, y)
     end
+  end
 end
 
 function love.keypressed(key, scan_code, is_repeat)