I feel like your game has a lot of potential, and it's a good take on the power theme.
Some feedback: the instructions button is not working, at least I didn't find it necessary and understood the game without them, it really needs some background music like other comments said, the deep voice took me by surprise. Most of the game I'm just waiting for the guys to finish playing so the first "mechanic" I would add to a full version would be something that the player should be doing while the customers are inside, maybe generate more power, fix a broken machine, anything with a fun minigame. Finally, it would be a nice to have an actual number in the cash bar cause I didn't know what I could afford at some point.
Like I said it really has a lot of potential and I would like for the game to be expanded further only with some changes! For 2 days it's a good job.