Goblin and Coins II has been in development since late 2017. Right now there's an alpha build being tested with tutorial/intro level, map, trader, "the underground" and 4 various regular levels. Watch this short video to see how GnC2 is different from GnC1, with a focus on caves/mines in the 2nd half of the video.
If you want to follow GnC2 progress, please visit the store page and click wishlist and follow now.