Get gold by clicking on the clouds when they are gold (only happens at certain times).
Gold Cloud at Start
At the starting point you will see a cloud that is gold. If you click it at certain times it will give you gold.
How to Get Karma
To get Karma, which is the premium currency of Ninja Warz, the easiest way is using Karma Relics, which give you karma frequencies of time. You also receive it for going up a level.
The easiest way to get it, however, is simply to buy it yourself, using real money. There are no official cheats to get it easily and for free.
Increase karma
When you are at the Daimyo press Up, Up, Down, Down, Left, Right, Left, Right, then B, A, Enter. The 'Konami Komando' Achievement will now be in your Ninja profile and you gain 1 Karma, and you get the 'Talisman of Nerdly Prowess' which gives you +10% Attack Speed.
Karma for Gold
If someone offers to trade you Gold for Karma, don't do it! While Gold sounds more valuable, it isn't, as Karma often has to be purchase using real money! People offering to trade Gold for Karma are often trying to scam you.
Karma Stones
There are karma items called Karma Stones which will give you karma just for having them equipped. If you have one equipped you and don't play the game for a couple of weeks you will have a lot of karma. There are different types of Karma Stones, the first one is the weak Karma Stone and it gives you one karma every 12 hours.
Talisman Of Nerdy Prowess
When you are at the Daimyo press Up, Up, Down, Down, Left, Right, Left, Right, then B, A, Enter. The 'Konami Komando' Achievement will now be in your Ninja profile and you gain 1 Karma, and you get the 'Talisman of Nerdly Prowess' which gives you +10% Attack Speed.
Gold Cloud...