Nice Graphics and look.
I could only move with wasd, wich is not normal with mame cabinets. It should rather being mame defaults and/or remappable controls. It the same as Howard said.
A Another thing about scrolling:
When it scrolling, you have not a change, what it would happens forward, since your man is near on the end before it scroll. It should actuelly allways put him on the center of the screen.
The best is the man was on the top of the screen, when you walk down, and the other way (and the same on right/left). Many 2d platformes does this way.