I've been playing this game for a while now, and I feel the game started off reasonably fast paced, and slowly deaccelerated its pace to the speed of a snail crossing a salted street. Most idle games go through phases where you gain a ton of progress, followed by slow phases, and then repeat. This game, however, is a gradual decrease in speed, which is bad for longeivity.
If you figured out a way to work in upgrades that allowed you to progress faster, this would be a great game.