For my contest entry, I decided to do a loose port of the flash game Cube Droid Saves the Galaxy, which can be found here
So far, I'm only in planning stages, but I do have a mock-up of a level to show that it's possible.
(For the record, that's level 5-2).
As for other noteworthy details, I'll try to include as many of the original levels as I can despite my smaller screen size in the Y direction (the original is 12*12 but mine is 10*15). I am planning level packs, and if I don't have all of the levels in the game I can assure you that the levels will be in a level pack.
I plan to include the cut-scenes if I have enough memory.
So, yeah, that's what my plan is. I hope I can complete it in time, because for the first half of the contest I'm still in school.