Now this is a fun one!

The difficulty is high, so make sure you play it on normal mode before you shift into something more challenging. I've played for over four hours, and I'm pretty sure I still haven't found everything. There's excellent replayability here with the different modes. Keep an eye on your food - it decreases fast and not all of the vending machines will have food in them. I highly recommend buying only food in the store (and getting your water online before working). Maybe one backup medkit...but if you strategize washing your hands and drinking water (only do these if your unwell meter has something in it so you don't waste them!) you probably won't need it for a while. 

Make sure you move the camera with "q" and "e" at least once per area, or you're going to miss out on some goodies.

My only gripe with this game is that the battle system for your digital pets is really annoying to do. I still don't fully understand the battle mechanic, but I'm winning anyway so I suppose that doesn't matter. The upside to this is that doing stuff with your digital pets is completely optional!