In the arcade original and at least the ST version which I also played, there is move you can do, an elbow hit. It's a very good move. Unfortunately I can't seem to be able to do it in this version (DD1 that I tried). Is it some combination that I can't think of, or is it bad emulation?

It's Shift + Space on keyboard. On the xbox-controller, it's A + B.

Excellent! Thank you very much. :)

I'm glad it helped, enjoy the game! :)