Thanks for playing - and good score,
Good to know it is working on someone elses mobile, Godot is a bit stuttery when it starts in HTML - I have noticed many poples projects with the same issue. Also Im sure I am having memory problems if you play for a long time - Assets are probably not being freed properly. I plan on an update that reuses assets rather than deleting and remaking.
The music is not on a loop, it only plays one song per level - thought if you constantly heard it, it would get annoying. Intro has one song and game randomly chooses between two songs for a bit of variety.
Movement was deliberately limited to make the game more challenging - you are the second person to mention it and I maigh change it in the future.
I need to update the scoring system with a bonus score for leach level completed - the faster the higher. As you have noticed currently the longer you take on a level the higher you score - which is not right.
Great feedback - very appreciated.