I'd like to resubmit this. I was going through some old files and found this scrolling shooter game I made in a class a few years ago on Game Maker 7. I called it Epoch Battle. You just use the arrow keys to move and the space bar to shoot. It had a few bugs from being made out of the class tutorial, I think I've fixed them all. Let me know if you experience anything funny. The only link to it was in this forum a few years ago to megaupload.com. Since that site's gone, it's been unobtainable until now.
Get it here:
Download Epoch Battle