Love it, even if it is a copy
Don't know why everyone is so mad... games copy each other all the time. Pretty much every platformer ever is a copy of Super Mario Bros. Besides, it's not like you're selling it or anything.... in fact, I actually think you did a great job at this. I'm a big fan of the original and this one is just as great... better is some aspects. I like that I don't waist fuel above ground, I'm glad I don't fly, I like the addition of a map, and although I haven't beaten it yet, I do enjoy the lack of "watch out for Satan" radio calls.
This is a great game and worth of the front page... not only did you do a great job with it's creation, but I'm sure you learned a lot in the process. I'd give you more stars, but they only allow 10.
Also, I like to just dig away the dirt... OCD style. I want to clear the map. Use to do it in the pyramids of Mario Bros 2 as well. I would love an 'infinite money' mode so I can just play around in the dirt... I don't know why it's so fun, but it is.