It is fun! To be completely honest, I didn't expect it to be very fun going into it, but I was pleasantly surprised. I enjoy the mechanic of limited fuel with the spawn planet being the only way to get more fuel. However, I think it was broken on level 4, as the planet I spawned on did not refill fuel. Other than that, however, it was great, just not a super special or unique experience for me.
Unfortunately, I happened to notice that some of the music was Mariah Carey, and I must rate audio accordingly. (I'm just kidding obviously, although I do think the audio could have easily just been one track since it only takes 5-10 minutes to play through)