Here is a Power Apps custom control to display text with a drop shadow. It can also be used to create an invisible text effect or a glow effect.
Among other you can configure color, font, shadow blur and size.
Also, give it a go in Canvas Apps, I'm sure you will find it fun and come up with some interesting effects.
Following properties are configurable
Download from: https://github.com/jenschristianschroder/PCF-Text-Animation