This is great, amazing work! Amps up the quality of my game by heaps (will share with you once finished). I've got two questions though.
So I have heatwave shaders up and running on my Moto G6 Plus yet your glitch shader does not seem to work when running on my phone. On Windows it does run flawlessly, even in conjunction with my heatwave shaders. Do you have any thoughts on this problem?
Secondly I was wondering where I could find the code to disable or minimize the RGB shuffle effect as I'd like to keep the game minimalistic without messing with the colors.
Thanks a bunch and if I'll keep using this I will give credit and donate where due!
EDIT: I do use V1.2 as I still need to port my project to GMS2. This could maybe play a role?
So I've updated to version 1.3.2 (GMS2, 2.3.7.476) and I'm running your shader on 1080x1920 to get it to work fullscreen (on a Moto G6 phone). The game runs on a steady 60 fps, yet when your shader is enabled it drops to around 27 - 30 fps. Is there a way to improve the framerate? Maybe by reducing the render resolution or quality or something in those lines? On Windows the FPS rocks a steady 60 with your shader enabled.