Very similar to Pick and Dig. The major changes are that you can collect money to use to purchase permanent upgrades to your character and the introduction of gems that can be found in the level. Another change is that instead of using the arrow keys both to move and use items, using items is now keyed to another button. This should greatly reduce accidentally triggering an item.
Description to Pick and Dig:
Move your character around the screen to find the way to the exit. Each time you push the arrow you either move one square in that direction, or you use an item such as a shovel (break through rocks beneath you) a pickaxe (break through rocks to your left or right) or up to create a ladder. Each of these items can only be used if they are in your inventory and only once per item. Collect keys to open doors and the more tools you get the more points you score.