Thank you for the feedback !
I worked on this project for about 3 weeks on my free time, I would say about 10-12h a week (about 40h total probably).
On the next update I'll adjust the volume and more importantly put a mute button for the music ^^. I hesitated about putting an introduction thinking it would part of the fun to discover what to do for each screen and focus on doing instinctive controls.
I plan to release a more complete version on the Google Play Store with more mini games and more polished overall.
It was my first project with Godot Engine.