Can't add explanations of abilities.

If I HSS up and critical miss, can I still continue to move away, if I still have movement left over?

Yup, you can.

Thank you sorry for not posting definition

To note, page 15 of the rulebook:

ROLLING 2 AND 12: CRITICAL MISSES AND
CRITICAL HITS
If the attack roll was a physical two ( ), all targets of
the attack become missed, even if the attack total would
normally hit one or more of the targets. This is called a
critical miss. Resolve the attack and, immediately after
resolutions, deal the attacker 1 unavoidable damage.

So whenever you get a critical miss, you finish the entire action you're doing (in the case of HSS, make your second movement if you're able to) and then you take the damage afterward.

We would be better off answering the related question and reminding people that even if you did click off of Hypersonic for some reason in the middle of the action you get to complete it:

In general to everyone, please take a few seconds to clean up the formatting and spacing a little and try to use quote blocks if you are going to cut-and-paste directly from the rule book. A default cut-and-paste is borderline unreadable on mobile or if you change the page size at all.

The additional rules text is always appreciated of course

I prefer using indent over quotes. If you quote a post with a quote, it disappears. If you quote indented text, it shows up.

Yeah that is a great point. I wish there was a multi quote option, but indent looks lovely as well.