I just bought Scratches and have been having problems getting it to work as intended. Upon first run it was laggy, stretched, and skipping frames like mad. Here's how to fix it all:

1. Go to your NVidia Control Panel; under Display -> Adjust desktop size and position,in the "Scaling" tab, make sure you have "Aspect Ratio" selected as your scaling mode, and make sure you are performing scaling on the GPU. Check the box that says to override the scaling mode set by games and programs.

2. Right click the Scratches shortcut and do all of the following in the Compatibility Tab:
-Run this program in compatibility mode for Windows XP (SP3)
-Disable visual themes
-Disable desktop composition
-Run this program as an administrator

If you do all this, you should get Scratches in full screen, correctly centered on your screen, and there should be no lag, or frame skipping.

Good luck to all of you!