Hello! I'll answer what I can. No Steam Deck support currently but we will look into it at a later date. If you browse the comments below you will find a couple of people who seem to have it running on Steam Deck using something called Wine. Might be worth asking them for help.
Each run is roughly 3-5 hours depending on Torment level. The later Torments (T4+) tend to be on the longer side. Plenty of new features that we are still working on. Rearrangeable crew portraits is a big one. Lots of additional things that we are not ready to announce. We also have not determined the final price on Steam yet, though it will be definitely be higher than the current price of the Itch Backer Alpha.