Excellent! Love the blackhole portal idea! This could definitely be developed into some kind of exploration game. It looks like the objects spawn randomly from the distance, is that right? How did you do that? Although the streaks on the white ball give some sense of movement, it feels a bit static when you change direction. It might be good to use cine-machine to ease the scene movement a bit.
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Nice ideas, thanks! I love exploration games - will definitely consider that!
As for the objects - they actually spawn in a grid with random offsets and some chance that some cells of the grid won't have an object in them. It's nothing special as an approach, but I think it worked reasonably well (and was very easy to code! :D ).