First of all, good randomly generated cave you got there.
However I felt like it needs a little bit more of a goal to make it an actual game.
Perhaps you should include a reason to dig new tunnels, like for example you need to open a path to connect a miner to their precious gold or gem, or you are trapped in a cave and need to dig your way out.
Just adding a goal I feel it would make your game more fun.
But keep trying and keep them coming.