how to flip a sprite

i have a 2d gui sprite UI i'm using as a character. it's a child to the character controller. My problem is that when the character jumps to a platform, the sprite is facing the wrong way. I don't have movment for the character. It's just a jumping game on mobile device. When you tap the screen, the character hops to next platform automatically.

After the sprite jumps, I want it to flip immediately to opposite side preparing for next platform or I can have the character to flip facing the platform it's jumping to if it's currently facing wrong side.

my level looks like this. I'm sort of a noob don't overcomplicate