Thanks for commenting! The project really brings back memories of Fruit Ninja, doesn’t it? Hahaha
Indeed, there seems to be a limitation in the Godot 3.6 game engine when it comes to exporting to Web/HTML5. I tried applying the optimizations I know (avoiding variables in loops, reusing code, using object pool...), but performance on some devices — especially on the web — is disastrous; even my smartphone struggled to run the web version properly. I suggest trying it on another phone or even on your computer — the experience is different. Give it another chance.
It's worth noting that I briefly mentioned this in response to the first comment.