Hey, I played & beat this game both by surviving and by gathering 100 volts! Here's my feedback:
I absolutely love the attention to detail in this game. Each time you hit a tile, the screen slightly shakes, everything (including the background) shifts color to match the charge, and the little cube changes charge sign as well. This is a nice twist on classic phone games, like Gravity Guy (and could actually make a pretty good ios/android game). Also liked the error messages like 404: electrodud not found (nice twist on a common error haha). Oh, and the background is very simple, but quite awesome. It'd been nice to also see other electroduds jumping up & down in the background tiles. Would've made sense with the game's theme and would've been a nice detail for someone to realize.
I think moving the volt count and the survival timer to another part of the screen would be way better. While playing, I was kind of bothered by how much of the center of the screen both of them occupied. I understand that you want the top to be free, but perhaps having a top bar for this would be better. On the timer: I really think there should be a way to tell the time without having to explicitly look at the number. I'm too busy focusing on not dying/maximizing my score while playing, so I had a rough time gazing away to see how much time I had left. I think speeding up the music or changing the color/making the timer blink faster and faster when running out of time would be way better.
Oh, and I found a slight bug: the music won't loop in games that take place after the player wins (won by timer the first time and this happened).
Overall, amazing job, I had a very good time playing your game!