Diggy Prototype
Diggy is an unnamed prototype for an idle/incremental planet digging game. Mine resources to upgrade your mining rig to discover new, powerful minerals, and use those to become even stronger.
It is unfinished, unpolished, and development has stopped indefinitely in favour of a more advanced and polished game. However, this prototype still has multiple hours of content; the endgame is found at about 20,000m. ESC closes the game, arrow keys/space to control manual fire, and mouse to use buttons.