cool game. it looks good but you can get everything way to quickly.
here is some suggestions
shop: and more weapons which gives bonuses to certain missions, something like "smiths hammer" which would perhaps give a 2X bonus to reward from smithing missions. also higher tier weapons like "master smiths hammer" which would do the same thing but with highier multiplier. also make sure you the weapons are spread out instead of all withinn the same purchase price. that way the player will feel that they can actually use the discount. since now its allmost all chance since there is only like 1 weapon. and if it is only a 20% discount you can problary get that weapon without problem in 5 min. more tool upgrades. the tool upgrades should be avaible depending on how high lvl the mission is. not on hero lvl. so you have a reason to upgrade missions beyond lvl 10.
there is a glitch. if you buy a item. then exit to menu then load the saved game you will have the amount of money you had before you bought the item. but you still have the item
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 "Protector IV"){kind=icon}