The FlappyCoin game inside the wallet was too heavy. we decided to skip it and update straight to the built-in exchange inside wallet (which is completed). Will release the new version tomorrow.
What was heavy about building the game into it? Looking at the source you were just creating a tab in the wallet that launched the game from an external website. When you say "built-in exchange"... what exactly does that mean? I don't mean to be negative... but I hope it's not just another attempt at adding a tab that launches an external website like the game... adding tabs that launch external websites provides little innovation to the wallet... just sayin...
[EDIT] I really want to help (and so do many others)... if you can't truly integrate the game or exchange as stand-alone with-in the wallet (not just links to external websites) just say so... we can help you explore other possibilities... PM me or anyone else and we will help with coding issues...