The new COSMIC desktop by System76 and Pop!_OS is very promising. I've been running the pre-alpha, and have been very impressed.

I know, I just bought a Nebula case from them. I would gladly give some money for one of those shirts.

To add, Mull is on FDroid, which means you don't have to rely on Google Play or the Aurora Store!

Just finished all the Rustlings exercises, moving on to some simple GUI exercises with libcosmic!

I'm not alone in struggling to finish a campaign, it seems! I really enjoy the sense of discovery and exploration that comes with starting a new game, but once I hit the mid-game point and the world's boundaries are established, my interest starts to fade.