Fun: I'm currently sitting at just over 10k wisdom. The game was fun for a moment but then you realise that everything is just a timewall. I always had enough money to buy the next upgrade, I just had to let the game sit for the energy. The gameplay ended up being just 20 second snippets before much larger amounts of idle time.
Balance: The past upgrades are never worth going for as they are not only slower than the future upgrades, but also weaker. Time magic is entirely useless at the moment in a normal gameframe, given that you will always get a constant 5 wisdom/min, the upgrades only gaining use as a way to let the game idle longer if you were pushing for a significantly higher amount of wisdom like I did.
Uniqueness: The only part that isn't quite unique would be the initial start, but after that it comes quite into its own