This game cost me $20 USD or so, and gave me 113 hours of enjoyment. That's over five hours of play per dollar -- certainly more than I've gotten out of some AAA titles that cost me three times that much. It was a fun little game.
So why the thumbs down? Well, because despite being a somewhat *fun* game, it's not a *complete* game. And at this point it is not clear to me that the game will EVER be complete.
The devs posted this disclaimer long ago: http://www.sauropodstudio.com/steam-early-access-disclaimer/
stating the features that work and those that are planned. The disclaimer is pretty accurate, it doesn't lie about what's working and what's not. The problem is that the "what's working" list has not grown by a single item since I bought the game -- litterally the ONLY feature of any note that has been added was a pause function -- which would have been greatly appreciated if I hadn't worn out the gameplay many months ago -- but they haven't made any visible progress towards that complete feature set they said they were planning.
Some of this is understandable. It's a young studio, this is their first game and the developers are less experienced than those on a lot of other games. They made some early mistakes and had to refactor the code base, which took a long time. Normally, refactoring (while frustrating for end users because it consumes time with no new features) is useful because it reduces future bugs and makes implementing new features later much easier. But these things only matter if you RELEASE UPDATES after the refactoring.
As I said, this is the studio's first game, and as you can see it's not going super well. It's entirely possible that they are out of money and about to go bankrupt for all I know. So it's impossible to say when or even if this game will get another update, or if a hypothetical update would even contain any significant improvements.
So while it really boils down to the typical early access mantra of "Only pay for it if you are happy with the CURRENT state of the game", and while the current state of the game WAS worth the money I paid for it, I can't really recommend this game because I know that most people are less easy to please than I am, and want a finished product. This game may never be that.