I started late but managed to get this much done in 6 hours. Which is the "core" of the game. The game is called "To the Core" and is based loosely on the Movie The Core with Hillary Swank.

Dig deeper and deeper to the core to place the nuke and make it back out in a time limit. Collect ore for power and avoid hazards (still to be added). If you run out of power its game over!

https://youtu.be/tdN_Vc9lcCg