Thanks for the kind words!
I've updated the asset pack to include a sheet with icons for all the tools except for swords, which is something I'll do later in a separate icon pack, along with icons for armour, clothing and stuff.
I've also fixed the missing hands for the sprite sheets you mentioned.
There are icons for stone in the Crafting Materials icon pack, on the 4th row, columns 1-3.
Let me know if you find any other issues, it's a big help!