How do I fix this sentence?

As the beat of the song went up, we screamed loudly in order to match the beat.

louder instead of loudly

Can I put "s" at the end of beat?

I wouldn't.

How do fix these two sentences below:

1. Stretching helped me increase my muscle strength and relieving tension on tight strained muscles, which I often used during my stress moment
2. Eating two cups of ice-cream every night is my habit because it has sweet and delicious taste, which always makes me feel hyper and pleased and recalls my happy moments in the past, such as party at the beach and my 18th birthday party.

To fix this sentence, you can make a slight revision to improve its clarity and flow. Here's the revised sentence:

"As the beat of the song increased, we screamed loudly to synchronize with the rhythm."

To fix sentences in general, here's a step-by-step approach you can follow:

1. Identify the issue: Determine what is incorrect or awkward about the sentence, such as grammar, clarity, or style.
2. Determine the intended meaning: Understand the message the sentence is trying to convey.
3. Rearrange or revise: Make changes to correct grammar errors, improve clarity, or enhance the flow of the sentence.
4. Read it out loud: Ensure that the revised sentence sounds correct and natural.
5. Proofread: Check for any errors or inconsistencies once again.

Remember, when fixing sentences, it's essential to maintain the intended meaning while improving its overall structure and readability.