I found the ghosts were too weak and I'd always die to the humans :(

There needs to be some way to boost your ghosts and make them stronger to be able to survive.

Also the little ghosts were really hard to click on to move around.

I really like the idea, and it matches well the theme.

Graphics are a bit too crude for me.

I think a good improve would be to give a bit more information about what's happening (showing attacks, remaining hitpoints, ...

Also the souls counter should be near the button

Nice game, I loved the concept. I realized later that when human dies it spawns a soul which we can collect and use it to create another ghost.

I have some ideas if you want to develop the game further.

1. Some indicator would be nice to see how many souls we have left

2. At start only one or two souls would make the game more interesting, however capacity can be increased via upgraes

3. Different variety of enemies

Overall great game :)