So far, this game looks like it's going to be one of my favorite games of all time. However, I cannot say that it's perfect or spectacular without a lot of bias. This game happens to have just about everything I love in a game, so of course I really, REALLY like it, but it is not without faults.
The reason why I like this game so much probably has to do with my favorite attributes to have in a video game. They would be: exploration, puzzles, atmosphere, huge size (why I like games that use procedural generation so much, which this game has) and space.
So, what's good about this game:
-Very atmospheric. This game is so relaxing and calm, while also keeping that mysterious air. The 'artifacts' are all interesting to look at, and the isolated feeling this game brings is just niiiiice.
-Quite a bit of exploration. Each planet is unique, with lots of different artifacts to find.
-Interesting puzzle mechanics. I've never seen a game with mechanics quite like this one.
-Nice aesthetic. The colorful minimalist style is just really enjoyable to look at.
-Basically infinite puzzles to solve.
-The search for the 'Anomaly' as it's called, is really nice incentive. The very existence of the Anomaly gives this game a lot more purpose than it would have had otherwise.
What's not so good
-Not friendly to people just starting out; not much explanation is given as to what to do. The mechanics and stuff aren't too confusing, and one could figure out what to do by going on the Mirrormoon EP forum on Steam, but this is still quite a problem.
-If exploration isn't your thing, you probably won't like this game much, unless you really enjoy the puzzles. The main appeal of this game is split between the exploration/atmosphere (I'm lumping the two together) and the puzzles.
-The puzzles are a strange mix of confusingly abstract, and too straightforward. The tutorial puzzle and the anomaly both show just how amazing the puzzles in this game can be (and there are multiple anomalies, so don't worry about there only being two really good puzzles), but then the rest of the puzzles are kind of simple. I tend to be really good at puzzle games, so I encounter this problem to some extent in most puzzle games, but this one feels like it would be a little on the easy side even to someone who wasn't good at puzzlers. Maybe that's a good thing(?) but honestly, trying to say it's a good thing, when it is clearly a turn off for those looking for a mind bending puzzle experience, would be outright lying,
-I have heard of people despising the art style. Not going to lie, I think this is a stupid argument, because if you hate the art style THAT much, then you can see from the screen shots that the game won't be for you, but I can agree the art style is somewhat hit or miss. Most people I know like it, and think it looks pretty nice, but there are definitely those that hate it.
So, of course, I recommend this game. However, I have to point out flaws to be fair.
P.S. I've heard this game called 'pretentious' and 'a walking simulator' before, a few times. I think both comments are completely off base, as this game isn't pretentious at all, and calling it a walking simulator totally ignores the puzzles, you know, the main point of the game.