itch.io

The how to play section explains it, the white number is how many clicks it takes to mine, green number is how much energy per click it costs. The more you mine without resting the higher your money multiplier, resting regains all of your energy. You can convert health to energy. You can also hold right click on pretty much anything in the game to see a description of what it does. Your goal is to get as much money without dying 

I just released update 0.3 which adds a Full proper Tutorial as one of the main 3 buttons on the Main Menu.
I'd love to hear your feedback if you're still interested!