It's visually insane, which would be fine if the ♥♥♥♥ that killed you wasn't impossible to see. The particles are pretty and everything, but the gameplay suffers as a result. For this game to really be playable, you'd have to either reduce the vibrancy of the ions, which would probably kill the aesthetic, or come up with some creative way to make dangerous things stand out from the background of moving particles. If the projectiles and enemy ships interacted more with the particles, it might be easier to deal with. Finding wakes would allow you to judge threats inside the cloud. As it is right now, it's just too hard to see, and I don't think that should ever be a factor in the difficulty of a game.
The achievements are kind of ♥♥♥♥ty, by the way. The 500k points in survival was really hard for me to get--I can't imagine getting some of these score achievements. There's evidence that more than half of the people that have them cheated (i.e., with the steam achievement program thing), since the ingame leaderboards and the percentage of players who have them don't match up. A few of the people who show up on the leaderboards may also have cheated, since their scores are insanely high (1.9 billion, as an example). I don't know. I don't consider myself a ♥♥♥♥♥ for achievements, but I do consider them part of a game. When they're chosen arbitrarily or carelessly, they can easily become impractical or flat-out intractable. That makes the achievements unfit for purpose, which makes the game much less attractive to me. It would be a better game if there were no achievements and just in-game leaderboards.