See a

See a "Save On Exit" pop up to prevent accidental loss of work. If you simply click X to close (I know, bad habit), the program simply closes without asking if you'd like to save your work to a file.
Liked the eye tinter, but since these brushes aren't magic wands (that sense borders). using a mouse to "paint" is problematic. Rather than just a revert to Original, it'd be helpful if there was an UNDO history so you could step backwards by stages.