Create Anything (https://www.createanything.com/) builds web or mobile applications from instructions. Generating in JavaScript (React).

Online publishing, file export.
Application testing possible on mobile via a dedicated “Expo go” application.

5000 free credits per month but seem unlimited (10000 used for 4 applications during testing).

Tests:

• Multiplication Farm: https://jeu-de-multiplication-la-597.created.app/
• Game in which you are the hero: https://jeu-dont-on-est-le-h-ros-704.created.app/mobile
• Flappy bird type game: https://jeu-d-oiseau-d-filement-h-916.created.app/