So the latest additions to the game looks somewhat good. Digger is drawing tunnels, eats crystals, and level advancement on eating all crystals.
However, I'm increasingly frustrated with original source decoding, since this process is actually takes more time, than actual coding of it in XNA. I'm not very excited in spending large amounts of time on this, since I want advance further into XNA. So I've decided to halt this project indefinetely. This was a good learning project, however I must admit it was a mistake to attempt to make a exact copy. I lost significant amounts of time studying unmaintainable code instead of something more useful. Yet now I feel much more stronger then I was at a start of a project, so now I'm thinking about next steps.
Most probably I will spend some time learning XNA using books, articles and tutorials. While doing this I will thing what kind of game I will try to make. I'm thinking about something like Super Spy Hunter, I actually really like this game:
But this is certanly not decided yet.