Hi KiraV,
Thanks for your interesting feedback, and congrats on being our first commenter! I'm glad you're enjoying it and that you're finding it useful for studying.
You can press H at any point to pull up a list of keyboard controls - you're right, that might have made more sense as a tab in the customization menu.
I hear you about wanting a way to fast travel. The island world where you spawn is meant to be a hub, but it is quite big so it can take a minute to find all the book-portals to the other worlds.
Here are some tips that might help if you haven't figured them out already: you can press shift to run, and can also click on far away study spots (e.g. chairs) to teleport directly to them.
In terms of getting lost, locations of all of the portals are indicated by little books on the map near the spawn point. I've attached a screenshot if you want to keep it open in another window.
have fun exploring,
M
