Hey, no problem! - credit where it's due! :D ...and I see what you did there, ha ha! ;)
Good point about speed! - You have a few options I guess? - Game speed - ie. everything slows down a bit, but the same solutions / strategies, albeit with a slightly more sedate pace... ....or ship speed, and that would completely change the timings and strategies for certain levels, giving additional challenge / replayability - Maybe you could have different types of probe classes for the different speeds, maybe even slightly thinner, wider, longer etc too, affecting difficulty / easiness!
Again, a beautiful game, simple to pick up, very hard to master! - and those particles.... Mmmm!.... :D