Ah see I have no way to bugtest on Android and this is my first attempt at an official Android build. If you head over to F95Zone, there's an unofficial Android build that someone made that might run better. Lemme get you the forum link.
https://f95zone.to/threads/worlds-crossing-academy-v0-1-5-5-teamemberwings.86666/post-8537695
That should take you to a Compressed Android version that may perhaps work better.
That being said, I've already entirely replaced the texting system with another one that is working much better, and I'm gonna do a mid-cycle patch that overhauls the text system, rewrites some dialogue in Ch 4 and 6, and fills in the missing Ch 6 H-scenes very soon. So if you can hold on for a little bit, everything should be fixed fairly soon.