Ah, how do I do this?

It must be frustrating to keep getting ×. You might fail if the specific probability range isn't met after tossing the coin. First, check your auto-mode settings, and then try investing gems to adjust the probability, hmm!

This is also a time quest I have left. You need to increase the front probability at the bottom, and it's very slow and frustrating at the beginning. Watching all three ads on the left is almost mandatory to collect money quickly. Use the collected money to level up the bottom part again. Then, you'll see an option to go to the second region at the top.

Just do as the person above said. You need to watch ads. Also, as you play more, your coin count will increase and the speed will get faster.