what do upgrading skills/attacks do anyway? the tooltip does not change at all.. like goblin punch does same dmg regardless of lvl from what i can see.. and upgrading doesnt change the description at all.. it would be nice if it was higher multipliers... lower time cost.. or higher chance to crit.. but if it is a higher crit chance, it would be nice to have some descriptor to explain that..
Rusty dagger, is also a dmg thing that doesnt change.. and it doesnt even have a crit thing to it.
healing doesnt change either.. so what does upgrading do? except costing more expensive mats to repair.