I like many elements of your game, but overall I felt like it wasn't a good experience for me. Here are the issues:
The beginning was quite slow and there was little to be done.
Then when I could ascend the game was beginning to be quite good actually.
Then I ascended enough so ascensions became trivial and so were the challenges. Many challenges were completed as soon as I started them (due to leveling early start upgrades).
The game felt more and more about just clicking upgrades as quickly as possible. Exhibitions were yet another layer of "just click quickly on upgrades without thinking".
I think you could improve the game massively if you moved some of the challenges into the early game (which makes the early game more interesting), while increases the challenge (or price) of late-game content, so it isn't just mindless upgrading.
Edit: Also let the x1, x100, xMax buy button affect the support upgrades, please.
Despite my comment being mostly listing issues, I do think that the game has good potential, and I hope you continue working on it.