I just cloned the repo, opened it in Android Studio and after a few version tweaks in its Gradle setup, it sprang to life on my Nexus. So I can attest that it's painless to clone and build it, which in my experience with open source is 95% of the battle (where the other 95% is getting the PR accepted :-/ )
This has been my experience often times as well. Especially when it's node/ruby/python projects that expect the privilege of dumping files all over my global file system. Anyway, there's no excuse for un-reproducible build environments like that these days.
All of my (new) projects have exactly two requirements: `make` and `docker`. Everything else needs by the build environment is handled by nature of using docker. `make docker-dev` drops you in an environment with build tools installed, with the project source code mounted as a volume so you can use all your normal tools on the host.
If there's anything I could change, it would be to add a setting that turns off swiping when I'm inside a story (to switch between comments/article/readability) along with swipe vote/reply for comments.