Android distinguishes app versions by the version code. Thus, each new release must bump the version code.

TIC-80 does not update the version code, it's still 10000: https://github.com/nesbox/TIC-80/blob/main/build/android/app/build.gradle#L18. This is the reason why newer versions don't get into F-Droid: https://f-droid.org/packages/com.nesbox.tic/ (which is a bummer).

Please update version code and version name before each release.