I was very surprised that it worked perfectly in my 10-year old notebook. Normally, nothing this fancy is playable in a web browser for me. The CPU was about 20% (I only have two cores, 4 threads).
The “messages” stuff is a bit confusing, but really they’re just simple quests. You don’t start with the mail on you, but all you have to do is wander around and find quest givers who will tell you what to do.
as for the game itself, I couldn't understand how to deliver the messages.