Probably the best game that solely uses mouse movement. A couple of things hold back my last ★, one significantly more than the other:

• The tutorial has a line that says "the the" at one point.
• There is no way to alter/reduce how much the screen zooms in when a particle defeats an enemy; the current amount, albeit brief each time, is really disorienting and makes you lose your place given how it doesn't particularly slow down the game speed enough to compensate.
• It was odd how even mission completions cause your ship to commit suicide, and that there is just no deathless way out.

Other than these matters, this is a very solidly made game, all around!