Such a hilarious idea for an incremental game, and very well-executed! Graphics and sound suited the theme perfectly and never got in the way (I saw someone commented on the audio being annoying, I didn't find that personally), and I was impressed by all the work that went into the tech tree, congrats.
It look me a few tries to pull off the first mask, initially I didn't get how I had to grab then move the mouse up just a bit to get it to slowwly slide off. But once I got that it was pretty much smooth sailing.
I liked that the upgrade window was nicely on the right so I could keep it open most of the time without impeding the gameplay. One thing I didn't really "get" was the buckets, they kept getting knocked off the table and I don't know if they every caught any masks :p.
It definitely had that incremental feel of ramping numbers/insanity, although once I had a couple of the relics and bouncing around and gold + miner mask upgrades it felt like I could just buy everything very quickly. It was satisfying to get to 1M masks and finish the game. Great job!