So the upgrade from Android Engine 4 to 5 has been a big task.

I think we underestimated not the upgrading of the engine but the part of migrating all of our systems to some of the new systems provided in version 5.

There have been a lot of fixing and a lot of bugs to just fix up the content

when you migrate from one system to a new system.

We used mainly C++ for the game code, and then we also used Blueprint when interfacing with the UI and design team.