I'm glad you enjoyed it.
In all honesty, in an earlier build, it was actually much less controllable. I had an idea that would theoretically make it easier to control in one-player where each instance basically toggled the thrusters instead of having to hold to thrust (the idea being that it would make it easier to go diagonally and to multitask) but in practice it just made it even harder to control. But I'm just as glad as you that it's actually playable on a single machine. Anywho, if you wanted to hear the full soundtrack, I posted a link to it on the discord server.
I accept the point about the lack of any indication about what direction each player has. But tbh that idea about randomizing controls after crashing is a pretty good one. I'll try to work out some way of bodging both that and the indicator for what direction the player is going in into the game.