Nice simple concept and well executed - great work! Something that can be easily added to with more varied ideas.
I liked how it was paced, not too frantic but you had to think about your shots.
I would've liked to see snap turn in there so I could play it seated too. Also, it felt unfair that I would be given gun colour near the end of a level that didn't have the same colour target. So I had to miss shots to force a colour change, but that impacted my accuracy percentage.
Nice concept where the visuals and level design could really be pushed further in the future - great job!