I wrote a quick puzzle game last week that turned out quite well:
https://lh3.ggpht.com/KRHhEqsKhGQR1dnscbH382LU-fv6jNX-fffqZmrOzyrQFpuJU_73kPVaWpEiW7oZrw
It’s available on Google Play here:
https://play.google.com/store/apps/details?id=org.newdawn.blocks
It’s also available on AppStore here:
https://itunes.apple.com/au/app/carubloc-lite/id668507578?mt=8
Cheers,
Kev