That's wonderful to hear! Thank you for giving it a try and providing feedback!
Oh! That's interesting. Thank you for letting me know. I just gave it a playtest to try and figure out what's going on.
I'm wondering if maybe it's because when the sun is nearly defeated in Extreme mode, it gains the ability to move, and once it's travelling rather quickly, the camera ends up having to zoom out really far to keep it onscreen, and then when you teleport towards the sun to catch up, the fact that the stars in the backdrop barely scroll at all (combined with the zoomed-out camera) makes it difficult to tell exactly how far you've teleported (really far!)--thus leaving your mini planets way far behind you, making it seems like they're either teleporting backwards or disappearing! Phew, I hope that made sense.
Unless it's a mistake in my programming that causes the planets to lose momentum when you teleport (I couldn't find one so far), or unless you're teleporting in front of your planets and getting in their way... but I got the feeling you weren't saying that, so I'm thinking the camera zoom thing is a more likely cause.
If all of that sounds completely wrong, maybe I missed something, and I'll need to keep investigating! Thanks very much for the feedback! :)