I woke up about an hour ago, and I’ve been focusing on getting the tile selection and digging mechanics working. Right now, the map is just placeholder color tiles, but they will (hopefully!) be better pictures soon. Here is an untouched generated map:

The box surrounded in white is the tile that the player’s mouse is over. When he/she clicks a tile, its health parameter goes down 1, with a lower limit of 0. (Tiles have varying strengths.)

For now, the only way to show a tile has been dug is its darker value, but once I eventually get some textures going it’ll give the illusion of depth better. Good luck everyone!