A fine example of the OGL at work.

Artwork is beautiful, maps are handy and descriptive, and the adventure overall is well-paced. Does a nice job of balancing the "comforting" feel of being "standard D&D" with unique elements that make it different and original.

The only (very mild) criticism I would make is that stats for opponents (whether taken from the MM or later in the adventure) make you flip to another page or pull out another book, but I suppose it helps conserve space.

Good job!

Really beautiful work. Neat concept for a world based on fantasy Earth in a mythical age. The write-up that describes each of these lands is a great source of adventure seeds!

A very nice layout, obviously inspired by a starship exploring the Final Frontier, but nothing wrong with that. I will definitely use this in my games!