Tapping the touchpad quick saves, holding it reloads. I did it on hard (original) mode so it is one hit deaths but I don't mind using the quick save.
I found all the secret areas available so far I think.
I realllllly wish they had left in the triangle jump button for the hop, and maybe had a dpad option for controlling it. The analog controls are a little skittish and you have to do a weird tap-and-press combination to do the hop which is not great. I was already getting used to it after 45 minutes but it seems like an oversight to me.
Wasn't there a "Work" command or was that only in Exoddus?
Also they made the mines that blink red and green way harder, it's more visual than audible and the green flash seems to have tighter timing.