I think it's a nice start, but it's lacking in a lot of areas.
First of all the powerups don't make it clear what exactly they do, to the point where I wonder if they do anything. The same thing goes for the upgrades, some of which appear to be unbuyable.
Buying the better swords is a nice idea, but I'd prefer it if there was a third one in between the two swords there already are. As it is right now the jump from 100 to 5000 coins per sword strike is massive.
I struggle to see the point of including the long attack. It doesn't get you more money than the short attack and it only wastes more time than necessary.
Finally, once you get to 100k the coin count doesn't fit on the screen anymore, and for some reason it already let me into the millionaire area despite me not being a millionaire yet.