Is it okay to start preparing a game since we already know the theme and what the goal of the games are?
Depends on what you mean by "preparing". You can do planning, but you can't put in any actual work (like coding, art, music, etc.).
Also, you don't know the theme. We have 10 themes this time, which will be revealed when the jam starts.
ok, I meant that we knew that it was going to be based around crafting
Are we allowed to create and prepare art before the jam?
Nope.
You can do planning, but you can't put in any actual work (like coding, art, music, etc.).