All and all, a very very good game for its price. Chances are, if you like Factorio (especially if you like its built-in "wave defense" scenario) or otherwise enjoy the idea of defending a factory from waves of enemies, tower defense style, you'll like this.
That said, I do have at least one personal issue (hence this may or may not apply to others. I suppose it depends on how many other players are physically handicapped): the control and keybind system is not very flexible, and for me at least, a few of the controls are completely unusable. You see, I have a spinal cord injury and control most games using a combination of my trackball mouse and Windows' built-in "on-screen keyboard"; I can barely use a physical keyboard, to the extent that the one I have usually sits unused under my monitor. Thus, certain control combinations are unfortunately too complicated for my limited control set up. For instance, while most users will probably have no trouble rotating existing objects or selecting regions (both of which require holding a key while moving the mouse cursor around and then releasing...), in my case, these aren't usable because the mouse cursor is busy clicking the on-screen keyboard. If, instead of holding a key, selection were a simple matter of tapping a key to switch into selection mode (clicking usually fires the weapon, but for some reason right-click is also a selection -for deconstruction- tool...), or if objects would rotate one quarter turn each time a key were tapped while the cursor was over them (I can position the on-screen keyboard accordingly), it would be much better for people in my situation.
worth noting, because this game is Open-Source, this also means I might be able to fix my own problem and have the solution added to the official build by submitting a pull request. Because of this, my overall rating of the game is not affected, because I'm not solely dependent on the developer to get around the issue (that said, I don't think you ACTUALLY want me trying to fix this myself; although I know a bit of Java, the bit I know is "how to make a mess of a source file and break everything" part). I still give the game a solid 9.5 out of 10, quite possibly the best I've ever given a game that I didn't pay at least $10 for.
Tl;dr great game for a quarter the price I would've expected to pay. It's like Factorio meets tower defense

All and all, a very very good game for its price. Chances are, if you like Factorio (especially if you like its built-in "wave defense" scenario) or otherwise enjoy the idea of defending a factory from waves of enemies, tower defense style, you'll like this. That said, I do have at least one personal issue (hence this may or may not apply to others. I suppose it depends on how many other players are physically handicapped): the control and keybind system is not very flexible, and for me at least, a few of the controls are completely unusable. You see, I have a spinal cord injury and control most games using a combination of my trackball mouse and Windows' built-in "on-screen keyboard"; I can barely use a physical keyboard, to the extent that the one I have usually sits unused under my monitor. Thus, certain control combinations are unfortunately too complicated for my limited control set up. For instance, while most users will probably have no trouble rotating existing objects or selecting regions (both of which require holding a key while moving the mouse cursor around and then releasing...), in my case, these aren't usable because the mouse cursor is busy clicking the on-screen keyboard. If, instead of holding a key, selection were a simple matter of tapping a key to switch into selection mode (clicking usually fires the weapon, but for some reason right-click is also a selection -for deconstruction- tool...), or if objects would rotate one quarter turn each time a key were tapped while the cursor was over them (I can position the on-screen keyboard accordingly), it would be much better for people in my situation. worth noting, because this game is Open-Source, this also means I might be able to fix my own problem and have the solution added to the official build by submitting a pull request. Because of this, my overall rating of the game is not affected, because I'm not solely dependent on the developer to get around the issue (that said, I don't think you ACTUALLY want me trying to fix this myself; although I know a bit of Java, the bit I know is "how to make a mess of a source file and break everything" part). I still give the game a solid 9.5 out of 10, quite possibly the best I've ever given a game that I didn't pay at least $10 for. Tl;dr great game for a quarter the price I would've expected to pay. It's like Factorio meets tower defense