Use APKPure App
Get Bingo for Google I/O old version APK for Android
Play bingo during the 2015 Google I/O Keynote
Play Google I/O during the 2015 keynote!
Data sourced from here: http://www.willowtreeapps.com/blog/google-io-keynote-bingo/
Open sourced on Github: https://github.com/dinosaurwithakatana/Google-I-O-Bingo
Enjoy!