I have LG G2 on CyanogenMod 5.0, and I set it to Arabic language. When I tried to play the hidden easter egg (Flappy bird), the flying robot is not shown when using Arabic language.
How to solve this issue?
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It's a confirmed bug related to RtL (Right-to-Left) feature on Lollipop.
The bug is to start the easter egg hidden in Google Lollipop, Flappy Droid or Lollipop Land depending on how you want to call, quit the game after a few seconds, enter "Developer options", check the "Force RTL layout direction", and then return to the easter egg.
(slight modification to correct the menu name)
Based on existing data, it seems it's still exist on Lollipop 5.0.2 (OP's case), but it's fixed on Lollipop 5.1 (based from my testing).
The fix is to update to Lollipop 5.1 if it's possible. As for the workaround, simply change the language to the one that is not RtL (e.g. English).