Cool app! Here is some suggestions to make it even better!:
1. When a photo is under another photo, it should move to the top when you move/tapp on it.
2. Groups. You should be able to create groups of photos that you can collapse/expand. Groups are in a little dock on the bottom of the screen. To create a group just import the photos, tap on the board and select "create group" (there is a free space on the bottom of the circle menu).
3. Minimize photos. tapp on a photo to bring out a menu. There you can minimize to the "dock" (where the groups are). A space saver in the dock would be to switch between groups and minimized photos. And ability to scroll the dock left-right.
4. choose background. My wallpaper doesent fit as a cool backround in the app.
5. ability tp switch to the iphone original photo app, so we can replace the photo app with this one

..
update:
6. doubble tapp on a photo to zoom in.
7. tap on a photo to bring out that menu (see 3.). in that menu you can choose view in full screen.
8. in that menu you should be able to close photo
9. you should be able to select what photo you want to import from the roll. not just the next one.
What do you think? It would be nice to hear something from the creator. Is this possible?