I love the game mechanics. It's simplistic yet unique and fun, and relaxing.
I just wish there was a little more description of what's going on. The basics are explained: avoid planets, avoid the sun. But what do 2 out of the 3 powerups, shield and sword (🛡🗡) do? I've experimented and they don't seem to decrease or increase hit damage to you or the other planet, and they don't add points. So what? (One at least is obvious: the plus shield restores health.)
Also, why am I saving up hundreds of gems for one of dozens of planets? Are they just visual? What's the difference between a regular planet vs. a "rated" or "top rated" planet? Rated, how, by whom, and for what?
Just a simple one-page help screen would be infinitely beneficial.
All that said, it's a fun game, and I'm going to play a little longer to try and figure these things out.