Wow this was a challenging one, it gets you with those patterns for the cubes. Especially with the different variations, almost feels like a tower defense game with the different enemy types and the reaction to them.
Those freakin purple cubes though I hate em, they're like camo balloons in BTD. And later ones are worse but I will keep quiet about those.
Though one thing I will say is that the gun and the crosshair gave me the impression that I was going to hit in a line towards the cross hair, that was very quickly answered, but still a bit vague. Otherwise though it's got some nice feedback, some crazy patterns and somewhat a feel to try and get you to speed up.
It might be worth adding a timer possibly? Since technically you can just wait to get all the cubes whenever you want. A timer could make that less viable.
Overall though, a way funner game than I though it would be, and some really surprising patterns in it.