It's a HGame kind 'Metal Slug'. I haven't played it too much yet but it looks interesting.
The buttons attack are a, s, d, z, x, c and v (I think)... depending on which girl you select.
Download:
http://hotfile.com/dl/6933595/64ebf26/Saa_Ushida.zip.html
I couldn't find pictures of that game...