I didn't have anyone to play with this morning, so my observations may be a bit surface-level (though I have to say, controlling two ships at once was surprisingly addictive).
Even with just a little experimentation, the game already feels well thought out. I liked the small details like the simulated environment, acid, and the way mechanics are conveyed through observation rather than explanations. That said, I sometimes found it difficult to determine the ship's forward direction, which made flying feel a bit too hazardous.
One issue I ran into: my Xbox controller didn’t work in the main menu, and in-game, it only allowed me to steer using the D-pad. Interestingly, my Logitech controller didn’t have these problems. EDIT: This was a browser-related issue. The standalone version works fine. Well, except that it crashes when quitting.
I’ll be back with more refined thoughts once I find friends.