I like that you have to actually aim for the right place for the Dragoons, it adds difficulty and variability, very friendly and cute. It's quite short unfortunately, it probably should have added some obstacles, expanded a bit the level, and maybe increased the speed of the hover (I'm not sure about the last one, but just a tip)
Dragoons can get stuck at the ends of the level, although the time limit should be a good measure to avoid exploiting that.
However, I must warn that if you keep shooting wrong and let them multiply, you may crash the game due to the excessive amount of Dragoons. I just wanted to comment on that.