Thanks for the feedback! There isn't actually a prestige system — after finishing the game, you get a permanent resource multiplier (x2, then x4, x8, etc.) so you can replay it faster.
We're currently working on a major overhaul of the game, which will include a proper prestige system and more changes to make replaying more interesting. So if you enjoyed the game, keep an eye out for it!
I hope you enjoyed the game, and thanks again for playing!