Is VberAI Studio paid-only?

A subscription is not required to use it. Credit spend is relatively high. If a few features become part of regular work, topping up credits later is the usual pattern—almost every AI generation request consumes credits.

How do you import a Figma .fig file into VberAI Studio?

On the VberAI Studio projects page, choose Import Project and select the .fig file.

Can a small game be started from zero experience?

That experiment is underway on this site. The articles here—starting with Getting Started—are a place to look for the shortest path through a given workflow.