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/ball.lua

@@ -71,10 +71,10 @@ function draw()
     
     -- Draw status
     if game.vars.state == STATE_PAUSED then
-        renderer.text(10, 10, "PAUSED - Tap to start", true)
+        renderer.text_scaled(10, 10, "PAUSED - Tap to start", true, 2)
     else
-        renderer.text(10, 10, "Frames: " .. tostring(game.vars.frame_count), true)
-        renderer.text(10, 25, "Tap to pause", true)
+        renderer.text_scaled(10, 10, "Frames: " .. tostring(game.vars.frame_count, 2), true)
+        renderer.text_scaled(10, 25, "Tap to pause", true, 2)
     end
     
     -- Draw velocity vector