Blacksmith is plain useless. Clicking does nothing late game. And the forge and blacksmith upgrades are too expensive and yields very little overall dps compared to miner upgrades.
There are just too many colors so it's hard to see enemy bullets to dodge when you killed some of them. Because there will be many loot on the screen and also bullets. TOO MANY COLORS!
Not really good as a hack 'n' slash, not really good as an rpg too... There is no atmosphere, no real story. Only playable when really bored of everything else.