Yes, the start is tricky, but once you absorb one sun, it gets easier.
So you have multiple monitors and the mouse moves away? I locked and hidden the cursor, if you start the game in main menu, so that would be a strange behaviour you encountered. Moreover, I can't really test it, because I have only one monitor.
The "black" you experiences is probably the void. Not all the space is filled with stars and you can look in directions where absolutely nothing is.
Mouse is hidden on the game screen... ... but does go off the screen (visible normally) and is still active, if I use mousewheel, visual studio (for example) starts scrolling and the like. The black is just that - black - it's like a weird clipping issue I can't really identify or describe correctly, you just turn a fraction and poof - nothing. Move the angle back, and they all pop back into view.
On a plus side, I got a lovely long tail of stars behind me this morning, and they were all chasing and locking into the tail - looked fantastic :) I think this is a play when you want to relax kind of game :)
Okay, so I have to fix the mouse somehow on the game screen. Unity has probably a feature for this issue. I will look for it.
I encounter the 'black' you were talking about now by myself. This seams like a render problem with high float numbers. For me the 'black' only appears, the farther away I go from the center. Perhaps I can fix this, if I reduce the length scale of everything.
That sounds nice. Yes, it is a slow-paced relaxing game. Definitely not a pace like in shooter games.
