This Seeking Tech guide will explain how you can beat Frigid Frosty in Astro Bot. Use the following video as a reference:
For the first step, use a spin attack on the top of the snowman.
Afterwards, you need to quickly run to the right.
When the slime is about to shoot at you, quickly move to the side to avoid the attack.
To deal with the second slime, jump to its side to avoid the ice attack. Avoid jumping directly in front of the enemy.
You can then use your spin attack on the snowman.
Next, you need to quickly move to the left.
When dealing with the two slime enemies, try to zig-zag your way to avoid their ice attacks.
Once you get to the top of the snowman, use your spin attack to end the fight.