Gravitas is rapidly approaching something playable, now that ships can be destroyed and new levels are generated.
“Something playable” is still quite far away from being an actual game. In terms of features required for even an alpha release, it still needs: scoring, match state, player lobby, AI, and better level generation.
Some other features I would rather have but aren’t strictly required include: special powers (especially warping, to get players out of impossible situations), better UI feedback for touch controls (which was not necessary for the original) and some match options.
But overall, progress is good.