Generally the game is interesting, and provides interesting action and fun for a couple hours, worth IMO 5$.
The game seems largely complete, however feels quite like a beta. There are a couple semi-major bugs around the main campaign (useless messages repeating over each other at the junkyard race, rift meteors hitting though the station killing unsuspecting trading player), unexplained necessary functionality in the otherwise quite simple controls of the game (in order to equip ships and hacking devices, you need to load them into the mothership, who knew? Also, afterburner using shift, required for junkyard race. A better explanation for equiping ammo would be nice as well) And the massive lack of detail and content in non-campaign areas. These deserve a special mention since apart from several well made areas, others appear extremely rushed. Among others, there are the capital cities, being nothing but a bunch of big blocks, unuseable or empty merchants in others, and enemies instantly respawning out of mid air.
The game world is static and non-reacting, rather surprising for a game describing itself as open world. If you want to preserve a feeling of immersion, stick though the campaign. Otherwise, you will meet NPCs set as enemy, neutral or friendly for no reason what-so-ever, friendlies and neutrals being so much as having zero care while you demolish their entire fortress or capital city, and a certain villian still being sitting around despite being supposed to have been blown up during the campaign. As opposed to the game description of millions of sectors, there are only around 65 visitable locations, two-thirds of them worth mention.
Generally the action is solid and the difficulity is rather balanced, but despite the rather large variety of weapons, ammo and ships, you will probably stick to the default ship configuration from the start of the game. Buying ships is pretty much impossible, as the campaign itself will give you almost no money, while the only other way of profit is selling ores, which is an extremely slow and tedious progress, and you will spend most of the gain on scavanging fuel and oxygen. (Worth mentioning, however, is that in a certain non-campaign location which i forgot the name of, there is a building completely full of "Treasure" in cargo boxes, being expensive ores) You will most likely be able to upgrade your engine and armor, though. On the weapons and ammo side, there isnt really a reason to not stick with the rocket launcher and the basic missle for most of the game. The weapon has what appears to be the strongest DPS in the game, contary to displayed statistics, since the cannon is supposed to be able to have more than double the rocket DPS. Not to mention that about every ammo deposit will have basic rockets to more than restore your ammo pool, unlike about anything else in the game with the exception of the gatling gun basic ammo.
The game largely sticks to its promise of keeping the entire game world destructable, with a few noteable exeptions of massive station building blocks, or, wierdly enough, astroids. However, to destroy anything that is bigger than, say, barrels or doors, expect to spend anywhere between a dozen to a few hundred(!) of missles. (other weapons are simply not damaging enough to destroy in a reasonable time) It appears that some of these werent even tested, as, for example, what appears to be a futuristic house has the explosion radius of the nuke back from the beginning of the campaign, and small, almost invisible wire has a solid explosion and massive debris to boot.
The campaign itself is interesting, and has its fair share of experience, and the GPS is pretty much god's gift, as without it you wouldve been hopelessly lost inside the stations where its hard to tell rooms apart from each other, although the failure conditions are completely mishandled and could be made better. If you lose a mission objective, you lose control of your ship, while the rest of the game goes as if nothing happened. This includes losing the pirate base generator, not managing to escape a self destruct sequence (noteable is that the explosion doesnt actually happen, so you are left staring at a completely intact station!), mining in fort valiant, or losing the junkyard race (despite not supposed to have any meaningful objective other than "show off your ego to this random guy!"). The end of the campaign also leaves you in a very distasteful cliffhanger, with the protagonist ironically saying "So whats next?", for the non-existant sequel or expansion. The developers also saw fit to display the end of the campaign at the very beginning of the game, no more, no less. Why bother building suspension if the artifact is already known?
Of another thing thats worth a mention, is that the save points could be handled better. They save the moment you complete an objective. No more, no less. Even if you are one life bar away from death, and an enemy is aiming a missle at you. Good thing that the game keeps track of all save points made, though, so you can load from an earlier point from the menu.
If you buy the game, buy it expecting a FPS experience, as, sadly, the other aspects are not really developed. The FPS experience, however, is solid and is worth trying. The 3D, zero gravity combat is interesting is fun, and the weapons feel statisfying while the surroundings are often destructable and/or explosive and is nice to interact with.