Great app, but room for improvement

I have a lot of fun with this app, but there are definitely opportunities to make it even better. Here are my suggestions:

-Zoom tool: pinch to zoom could be incredibly effective in detailed touch-ups
-two-finger navigation: when zoomed in, it would be helpful to be able to move around on the image for more precise placement.
-Custom tattoos: we should be able to upload our own pictures as tattoos
-Shading: this would be a helpful feature to further blend the tattoos.
-Undo: if I start erasing a tattoo, and accidentally erase too much, it would be helpful to have an Undo button instead of deleting the tattoo and trying again

Danimalhouse about Tattoo You Premium - Use your camera to get a tattoo