> How did you find them
This answer is enough?
"quiet area of my map"
:D there is no such thing. But I agree with zooming out. I even use Proximity Service ( https://play.google.com/store/apps/details?id=ss.proximityservice&hl=cs ) to turn off the display.
There's nothing wrong with music tiles. If they don't save your strings, that means your strings are incorrect. If your string is correct, the music tile will display the info about the music you put in.
Your "5 seconds" string seems unreasonably long. Did you convert mp3 into xm?
Get an xm file (don't convert anything into xm!);
Zip it. Follow the wiki's instructions on PC. If you're on mobile, I recommend using Total Commander to do it - just use the default, 6th level of compression;
Encode the zip file into base64 string. I recommend this site: https://www.browserling.com/tools/file-to-base64
I've successfully converted 3 xm files using this exact method. Music tiles are completely fine.
Hello, this is the one I use https://play.google.com/store/apps/details?id=com.rise.automatic.autoclicker.clicker&hl=es it has a lot of options, and also lets you see an ad every 12h to have the pro version.
I didn't play custom maps yet since I have like 5-8 levels lacking 1000+ waves.
But I didn't notice any lagging on my phone. I zoom out the map and there is no rendering of missiles and enemy health bars.
Another trick I do is using proximity service ( https://play.google.com/store/apps/details?id=ss.proximityservice&hl=cs ) to "turn off the display, but keep the game playing". This reduces the heat for me a lot. It is not terrible, but when the display is set on high light and I play for an hour, it's noticeable.