First of all, I love this game! Every time something new pops up I get excited for what it will be used for in the full release and I can't wait until we're able to fully invest in all the different skill trees.
A few suggestions (some may have been posted previously - sorry):
Market - Maybe we could some coins to have it restock immediately? To make it fair perhaps the cost could increase for subsequent restocks, with the amount resetting when it restocks naturally.
Storage - I'm not sure if this is actually already into the game as I have not tried every perk yet, but some form of item storage (like chest or something) so that I'm not constantly having to sell things to pick up new things. This was especially relevant when in the Demon Land I chose to get potions, and had to clear out a lot of inventory and make a new backpack just to pick them up.
Forging - I think that it would be cool if there was a way to cancel creating items in a furnace/forge/sewing station etc. without having to break the building. Maybe like if you pressed "X" or some as of yet unbound key to cancel production. Also if we could add things to production as well (eg. if we're making coins in the forge and we have at least 1 gold bar and 1 coal in our inventory, we can use them to add 1 more coin to increase the total by 1). This would just make it easier so that we don't have to wait for all of the coins to be done until we can make more (although the cancel production ke would also help with this).
Finally, I'd be happy to contribute to any wiki, but I'm not sure if there is one yet.
P.S. Please don't abandon this game like all other games I've ever backed.