It’s a gem. Like Brian said, it is quite difficult.
The game is 2D shoot em up with a lots of buttons (this is what I have the most issue with, as you may have half a dozen weapons, each tied to a button) in which you set up a plan to basically commit a space heist. The thing is it always gets out of control, and the various elements of the ships generate a chaos which will force you to improvise oftentimes.
It doesn’t require too much of your time (a single level lasts about 15 minutes on average, I’d say), but it is one of the most thrilling and exhausting modern gaming I have done.
Also, the game is based around playing small campaigns over and over (a bit like Invisible Inc, but even more tight). That may not be everyone’s cup of tea.