The little red ninjas made me get a bit aggressive trying to steal all my gold or whatever. The tutorial was very helpful I suggest everyone read it to get a good understanding of how to play!
I did find one little bug: I tried to play the game full screen and I am assuming the little ninja devils are aiming for the center of the screen. the play area for me at the time was in the top left so they were all collecting in my bottom right of my play area. It made for some fantastic farming! but I am guessing this wasnt an intentional design. With this bug, I was able to just create a one line on the left side of my money and leave it there and those little rascals can't touch it. Maybe having a timer on the line would make it more interesting on how you have to time your attacks