Built a no-code browser game engine where games live at their own URL. Stuck on free to paid conversion

I've spent over four years building Orbem Studio (orbem.studio), a browser game engine that runs entirely on the DOM with no canvas, no WebGL, and no external libraries. Every game lives at its own URL the moment you start building, no export, no upload, no separate host. The page is the game.

It's a full no-code visual builder. Top down and side scrolling movement, NPC dialogue and branching missions, inventory, combat with multiple enemy types, cutscenes, boss fights, gravity and platformer mechanics. There's also a built in pixel art tool so creators can draw sprites and place them directly into their game with a click, no switching apps.

A few games built with it: orbem.studio/games

The signup funnel at orbem.studio is finally working well. 10-15 signups a day from a cheap small Google search campaign, real engagement, people coming back across multiple sessions, even a few subscription popups triggering when users hit the game limit.
But zero paid conversions so far.

Free plan includes 1 game. Creator is $7/mo for 3 games. Pro is $19/mo unlimited. The popup hits when someone tries to create a second game.

I think the gap is that nobody has finished a game yet. Most users get partway through, add some assets, and stop. So the upgrade moment (wanting a second game) hasn't really arrived for most people organically.
Curious what this community thinks:

Does free-to-paid for a creative tool basically require users to "finish" the free experience first, or is there a way to create upgrade intent earlier?
Is $7 the right anchor price for this audience (hobbyist pixel artists, indie devs)?
Anyone done something similar with a creative/hobbyist tool? What actually moved the needle?

Happy to answer anything about the architecture too if anyone's curious how a game engine runs without canvas.