I enjoyed playing your game. I love how you combined the old "Motherload" gameplay with a more specific crafting system where certain ores were needed to make certain items. I fell this could be expanded upon nicely to make a much more complex game if desired. I probably would have appreciated an in-game tutorial. It did take me a second to figure out that I was losing coal to my movement, and thus I could not beat the game. Well done! I love the idea you implemented!
- Jedi