Red Sphere 4 is a fan-made recreation of Red Ball 4 (FDG Entertainment) on Turbowarp. The story is almost the same: A ball world starts being overrun by hexagons and the ball has to save it. It's a solo project by @axo824yt.

You can get Red Sphere 4 here: Red Sphere 4 by Team Courgette

Yes, it is and always will be. Infact, you can even make mods for the game with the game assets as long as its not used outside of Red Sphere 4.

I'm planning to add mobile support, but for now im sticking to PC only. Also it kinda already has mobile support. It just doesent have touchscreen controls so you would need to plug in a keyboard & mouse.