Souly recently posted a very nice Cave Story-esque one in the WIP forum here (near the bottom of the page); studying it and the original should help you a lot. If you're running Windows XP you probably have a screen magnifier accessory for easier viewing of the original, and a shortcut to that magnifier should be located at Start>Programs>Accessories>Accessibility>Magnifier. If you need further help, make a topic in the WIP forum and show us what you've been able to get, and we'll help you go from there. Good luck, and welcome to the forum!