Just submitted my game, Tunnel Treasure, to the Heart Jam! I'm happy with the result, and I hope you will be too. It involves tunneling deep underground and finding as much loot as you can before the time runs out. It is totally free (though you can donate if you want) and takes up less than 2MB to download. Check it out here:

https://itch.io/jam/heartjam/rate/238735

Thank you!