Here is an example of a program that uses nested conditional statements so the score is being checked and, while less than the winning score number, the player gets points for catching the falling colored orbs. Use the left and right arrows to move the cat, and look inside to see how I've coded this.
You can check out my video tutorial for Conditional Statements on the official Scratch YouTube channel (look for the Conditional Statements video series) and find a link to written resources related to this topic in the video description.