This is a completely useless product. I suspect it is meant to be a gateway product to introduce people to the author's other game, WARP, but it is so lazily done it will drive people away.
This product is so incomplete it is worthless. Essentially, what you get is the d20 check system, the d20 ability rules (using different number ranges, a list of unexplained trait names, and no rules for creating your starting scores), the d20 initiative rules (where you can do three actions on your turn), and a couple of other very basic subsystems. You have seen it all before and it was done better there. For a GM to use the system it would require them do to so much work that they might as well replace these systems as well.
The problem with this type of product is that it is something that anyone could do in an afternoon if they are familiar with D&D and it was uploaded without any realistic expectation of how it would be received. This product has no value to its audience.
My advice to the author would be to discontinue this product, and rewrite "The Adventuring Company" to include its contents, and add an example adventure with pre-generated characters and antagonists. Doing the adventure will require real creativity and work, but only that will get you anywhere.