Update all remaining games to use text_scaled with scale=2

Updated games:
- pong.lua: All text now uses text_scaled with scale=2
- air_hockey.lua: All text now uses text_scaled with scale=2
- asteroids.lua: All text now uses text_scaled with scale=2
- ball.lua: All text now uses text_scaled with scale=2
- breakout.lua: All text now uses text_scaled with scale=2
- counter.lua: All text now uses text_scaled with scale=2
- flappy_bird.lua: All text now uses text_scaled with scale=2
- lunar_lander.lua: All text now uses text_scaled with scale=2
- snake.lua: All text now uses text_scaled with scale=2
- tetris.lua: All text now uses text_scaled with scale=2

All 14 games now have consistent 2x text scaling for better readability.

games/lua_examples/counter.lua

@@ -29,21 +29,21 @@ function draw()
     renderer.clear(true)
     
     -- Draw title
-    renderer.text(20, 20, "Touch Counter", true)
+    renderer.text_scaled(20, 20, "Touch Counter", true, 2)
     
     -- Draw count (centered)
     local count_text = "Count: " .. tostring(game.vars.count)
-    renderer.text(game.width() / 2 - 40, game.height() / 2 - 10, count_text, true)
+    renderer.text_scaled(game.width(, 2) / 2 - 40, game.height() / 2 - 10, count_text, true)
     
     -- Draw last touch position
     if game.vars.count > 0 then
         local pos_text = "Last: (" .. tostring(game.vars.last_x) .. ", " .. tostring(game.vars.last_y) .. ")"
-        renderer.text(20, game.height() - 30, pos_text, true)
+        renderer.text_scaled(20, game.height(, 2) - 30, pos_text, true)
         
         -- Draw marker at last touch (convert to integers)
         renderer.circle(math.floor(game.vars.last_x + 0.5), math.floor(game.vars.last_y + 0.5), 5, true, false)
     end
     
     -- Draw instructions
-    renderer.text(20, 50, "Tap screen to increment", true)
+    renderer.text_scaled(20, 50, "Tap screen to increment", true, 2)
 end