Do the particles just move at different synchronized speeds?

yes, if you are speaking of the "hold space to boost" thing. if you wish to look at the code, simply open it in Greenfoot.

I also used a random respawn algorithm to give the illusion of seeing unique stars every cycle.

they respawn 100 pixels offscreen to the right.

I 'm a complete N00b, as you probably have already deduced, so if what I say sounds like N00b-speak, it is.

I just has a quick look in the code. Why are you initializing each and every star in a new line when you could just use a simple loop?

I just started coding a few months ago, so I don't know what a simple loop is, should I?

I'll quickly re-make this and I'll add the code just for you so you can learn from it :)

Ok.

Thanks.