Ok, you're right. The game's saves are no longer working on joiplay.
There is an alternate way to run this game (I learned about it today). Install File Manager Plus from the Play Store. Once installed, go to the .html (Index.html if you didn't change the name) and open it with your favorite browser (I used Chrome). And it will open it, I played and the saves work now.
I'll make a devlog post later to let everyone know. Thanx for the warning.