I like it, but it's a little hard to play. The challenge is there, but I'm used to shooters where there's actually a way to avoid enemy fire and I'm not sure doing that's possible with this game. Also, I seem to reach max upgrades pretty quickly. And, at the final boss, the second time I played, I ran out of time, which was unexpected. I thought I was being smart by taking my time avoiding enemies and was unaware there was a time limit. It's a fast, challenging game, but it seems the speed (whichever speed I'm at) actually works against me, either way. If I'm slow, I can't move fast enough, and if I'm fast, I'm likely to accidentally move into gunfire, so my unit is less controllable.
Also, not that it's really important, I'm not sure if the cry she gives out is entirely appropriate. It has character, but the little scream seems maybe a bit overdone, like she's a damsel calling out in distress, needing to be rescued or expressing pain that seems more like she's already critically wounded or dead.