I am looking to see what I can do with the gold I earn. Can it be used to buy permanent unlocks?

我昨天买的游戏今天库里就消失了？？？

As topic.

So the game looks interesting but I have no real idea what I'm doing. I figured out how shields, hearts and damage works, but what is steam good for? I move onto an outlined coin which highlights half the screen as green, what does that mean? I move onto a training dummy but apparently didn't do it right and don't get anything (not that I knew what I should get). Has anybody figured this game out?...

这游戏还有更新吗？法师的升级是特性还是bug啊，怎么升一级要80连