I tried to play it but didn't get very far. I have a rather small resolution on the laptop I had access to to try this out, so I had to play it on 800x600 fullscreen (since 1024x768 was too tall).
Anyways, the X coordinate on your button scaling is way off. It's not so bad on the left side of the screen (fullscreen) but the buttons on the right, I had to move my mouse about 100 pixels to the left of the button itself for it to be registered.