TL;DR: why are you reading? go play it!
well, it's fully released and a hella
the groundhog-day theme wrapped around whats a cross between a walking simulator and a point-and-click adventure (with some light piloting of your spaceship) works really well.
fly from planet to planet, explore ruins (which may or may not cruble around you while you explore them), solve puzzles which are mostly about finding the way, read notes of the builders of the ruins, piece together what happened and break the groundhog's day loop after going through every nook and cranny trying to figure stuff out only to find that you could have finished during the first run if you'd known what to do
the puzzles are perception and exploration based, and some arent solvable with data from the same planet.
(one needs two additional planets to be visited with a lot of other puzzles in the way)
back when i first heard about it i thought i'd get annoyed by the mumblemumble minute time limit per "run"
but as most things can be reached without further prequisites (besides knowing dae way) it really doesnt matter
(and i often killed myself way before it, so doubly irrelevant)
(it was also fun sitting there with my watch, resetting the timer on restart because the game itself doesnt tell you)
the groundhog day theme opens up some really fun perception games with time critical stuff because its reset anyway for each run
luckily theres one thing that's persistent: the data map with the discovered information snippets (which includes a waypoint system)
so you don't have to relearn stuff between runs (or do have to, theres an interface switch)