I wasn't able to beat it in the about 45 minutes I played it, but this game is EXTREMELY good! It's difficult, but not in a particularly unfair way. The beginning could definitely use some work; I found myself getting a little bored, so maybe shortening the prologue could be nice.
Also, the camera-center destroyer upgrade is quite hard to use; maybe increase its range. But other than that, I don't really have that many complaints! Good job!
also, the music is amazing!! If it's not a premade song like the RTP graphics are then good job! it's really great.