Finished the demo yesterday evening, and quite enjoyed playing it. Here is why I would recommend you giving it a try :
1/ The game runs on a (heavily) customized RPGMV engine, where every nook and cranny seems to be tailored to fit the story. You can craft whatever supplies you need (medkits and such), mod your weapons and probably pick your clothes in a future version too. I thought this was extremely well done, and shows the near-herculean technical efforts that must have gone into creating the demo.
2/ While I didn't run into any noticeable bugs, I thought that the combat system was a bit confusing and lacklustre, even for a fan of tactical rpgs like me. I guess the side view doesn't help. A top view may have been a better choice. Since the protagonist fights alone and only has limited options to act, I also never really felt the need to use many of the extra features, like "moving around" or "struggling". For me, combat always followed the following sequence, no matter the circumstances : open with an AOE (blaster), get a second AOE (shotgun) in if possible, and finish off whatever foes are closest. This can get a bit repetitive. Maybe the addition of more team members in the future, with a slightly slower/reworked combat sequence, can spice up things a bit.
3/ Ignoring the combat, gameplay is all about solving puzzles. There are little to no instructions however, and more importantly no real indications of what can be interacted with in an environment that, yes, is atmospheric but also mostly very dark. As an experienced player of similar games, the puzzles were easy to figure out, but could be unnecessarily frustrating to a novice player.
4/ The art is great, when it exists. The heroine is cute and loveable, and it's only fair that she gets most of the attention. However I also would have liked to see more of the other secondary NPCs on screen, even if briefly. It made no sense to me that I was able to see "Vas" during the prologue, but not "Cava" for example. Most locations, like the space ship and the robot city in particular, also seemed dull and lifeless.
5/ Writing comes as an obvious forte to the game. The ero scene ending the demo in particular was great. However, it fails to support the main story and especially the characterisations of the game.
First, the heroine seems to have her own agenda, thoughts and desires, and that would be fine if they matched the ones of an "average" human being, or at least someone we could rationalize. She doesn't seem that bothered to be suddenly abducted and abused by "aliens" after her home-world gets attacked and near destroyed. While it could be OK as the reaction of a light-hearted dumb bimbo, it's always weird to see "capable" characters, like an elite engineer who defines herself as "smart" and battle-hardened, behaving on occasion like a flustered school girl in front of adversity. It would also have been nice to leave some of her thoughts and decisions to the player instead of enforcing them.
Next, the story and the setting itself seem pretty weak to me : a couple of rebels take on an imperial military ship to free a scientist and incidentally the heroine, but then disappear without further notice. Who are these rebels ? What are their motivations and why did they need the scientist ? Were there other spaceships they could have left on ? Why did they free the heroine if it's only to drop her off like dirty luggage at the first opportunity ? We are all supposed to have watched Star Wars in our youth, but how can a single ship, with only one captain and his robot side-kick on board, successfully breach an imperial military ship ? Why don't neither of them object to suddenly cross half of the galaxy to go spelunking on an unknown hell hole to the only benefit of a stranger, as pretty as she might be ?
Finally, telepathy. I get that the heroine needs to have latent psy powers for gameplay reasons. However it's like the game jumps through hoops and holes to attempt to explain why all the species in the universe, even robots that never should have interacted with "primitive" humans, can understand each other as if language barriers never existed. The use of some kind of high-tech universal translation device would have been more convincing.
TL;DR: If you're looking for a game that has astounding visuals for an indy ero production, an ambitious what looks like to be Mass Effect-like scope, with a satisfying and bug-free gameplay, you'll enjoy the game. Don't expect the characters to be memorable or the story to always make perfect sense in the current early beta, but this may hopefully change with the next iterations of the game. Thumbs up.