I don't know as I am waiting on a physical copy. Had a steam key but gifted it to someone else. I think, reading the details, it is mission based with some exploration thrown in. Materials have to be gathered for upgrades, that sort of thing. Here you will find an FAQ.
I'll also try out the BEEB emulator.
I purchased aquanox on epic store, this game is good, consider also the budget price...it works!
I actually forgot this released I will add this to my steam list and pick it up on a sale. I haven't read through all the steam reviews yet but the rating currently is mixed.... they recently patched it in Dec (good sign) I need to watch some videos on the gameplay to make sure its close to the originals.
Just made a gameplay video on aquanox two months ago:
it's a good game in my opinion.