Sorry to hear that, yeah I was planning to add a sensitivity slider like I did in my other games, as well as a game over screen if you go too far away from Jupiter or something, but I ran out of time to do that. You basically get softlocked if you go too far out and cant find a way back again which is kinda a bummer. I'm glad you liked the fantasy and setting though I am pretty happy with the vibe this game came out with!
PS actually I did remember you actually can see your co-ordinates on the top left and those orange dots represent velocity so going back after going too far from Jupiter might be possible but I'm not sure. Anyways I will go review your game when I get time! :D