According to the statistics displayed on the door, I had already done over 9000 attempts to solve it, and about 30 attempts were near success, b. But none of them could be actually be called a success. According to the statistics displayed on the door, I had already done over 9000 attempts to solve it, and about 30 attempts were near success. But none of them could actually be called a success.

I used a full stop to break up the sentence and make it more concise.

According to the statistics displayed on the door, I had already done over 9000 attempts to solve it, and a. About 30 attempts were near successful, but none of them could be actually called a successcorrect. According to the statistics displayed on the door, I had already done over 9000 attempts to solve it. About 30 attempts were near successful, but none of them could be actually called correct.

Minor grammar and wording fix to sound a bit better

This time, the puzzle sent me to a valley where both sides of the hills were covered with colorful flowers. This time, the puzzle sent me to a valley where both sides of the hills were covered with colorful flowers.

This time, the puzzle sent me to a valley where the hills on both sides of hills were covered with colorful flowers. This time, the puzzle sent me to a valley where the hills on both sides were covered with colorful flowers.

Two groups of soldiers were on eithe twor sides respectively, and they began to shoot toy bullets toward each other with their toy guns. Two groups of soldiers were on either side respectively and they began to shoot toy bullets toward each other with their toy guns.

Two groups of soldiers were on the two sides respectively, and they began to shoot toy bullets toward each other with their toy guns. Two groups of soldiers were on the two sides respectively and they began to shoot toy bullets toward each other with their toy guns.

Today, I had a weird dream today. I had a weird dream today.

This sounds better in English.

I remember that I was aton the top floor of a house in my dream. I remember that I was on the top floor of a house.

Saying "in my dream" is not necessary here as it is obvious from the context.

I can't recall what had happened before that. I can't recall what happened before that.

I can't recall what had happened before. I can't recall what happened before.

In front of me, there was a locked door, and I had to solve a spooky puzzle to open it. In front of me, there was a locked door and I had to solve a spooky puzzle to open it.

In front of me, tThere was a locked door in front of me, and I had to solve a spooky puzzle to open it. There was a locked door in front of me, and I had to solve a spooky puzzle to open it.

This phrasing sounds more natural.