I love sit n' survive games so had fun with this.
I did find an interesting bug, I noticed that my power stop dropping. I continued playing, then eventually got the win message. Decided that I wanted to see if the power had truly stopped, and survived for another 10 minutes without using the generator, where my power never fell below 100%. Possibly an issue of no maximum power? I played a second time and managed to get the same bug again via over-charging my power. Although I did not sit for another 10 minutes to check that.