Thanks, glad you like it! The next major update will be the Ch4 maps update, hopefully shouldn't take too long.
Yeah the notes spawning inside the box is a known issue, it just happens when there's too much lag unfortunately. Hopefully I can get it running a bit better on mobile soon (mayyybe a proper android port at some point too? That is actually more work than just selecting it as an export unfortunately though so idk when I'll get round to it).
Aww thank you, yeah I have a kofi too, here it is: https://ko-fi.com/ezioeagle