Max I'm willing to pay is $0. Yep. If it's not free, I couldn't care less. There's tons of other stuff for free. If this was some open world game filled to the brim with content and they allowed you to go and play the intro for free, cool. But this doesn't exactly scream "full of content" now does it? It's an idle clicker game. The most anybody should be willing to pay for that is clicking on an ad to get some extra gold. If it had voluntary ads, such as the ones you explicitly click on to get a bonus, they'd make more money and you wouldn't even have to make a paywall. Also, the artist has a patreon! They already have voluntary patrons. If the free version was just an update behind, like every other patreon artist, I wouldn't care less. Making a game free to play and then charging extra for functional in game content is a scummy practice that even Activision has stepped away from.
Another thing, the other guy said "bros never heard of a demo" and as a matter of fact, I have. And I actually like a lot of demos. The demo of Castle Crashers is actually what inspired me to purchase the game. The difference is that this is just called "X" and "X Deluxe". If it said "X Demo" and "X", I'd also be cool with that. But it doesn't. It strips content out of the base game and releases that as the base game while locking the rest of the content that should have been included behind a paywall. The current model is literally the one we see with EA and Ubisoft and it's frankly disgusting.
Make the game free and profit off your patreon, add in voluntary ads and profit off of that, or properly label the demo version and standard versions.