Она создала новый проект.

Because the subject is она (she), and Russian past tense agrees with gender in the singular.

• создал = he created
• создала = she created
• создало = it created
• создали = they created

So Она создала literally means She created.

It is the past tense.

In Russian, the past tense is usually formed from the infinitive stem plus endings that show gender and number:

• masculine: no final -а
• feminine: -а
• neuter: -о
• plural: -и

So создала is the feminine singular past form.

Because новый is an adjective modifying проект, and it must agree with the noun in:

• gender
• number
• case

Here, проект is:

• masculine
• singular
• accusative, but because it is an inanimate noun, its accusative form looks the same as the nominative

So the adjective also takes the masculine singular inanimate accusative form, which here looks like the nominative: новый.

It is in the accusative, but for many masculine inanimate nouns, the accusative singular is identical to the nominative singular.

So:

• nominative: проект
• accusative: проект

That is why there is no visible change.

If it were a feminine noun, you would often see a different ending. For example:

• Она создала новую компанию.
  • компания → компанию
  • новая → новую

This is a question of aspect, which is very important in Russian.

• создать → perfective
• создавать → imperfective

создала is the past tense of the perfective verb создать, and it usually means the action was completed: she created it successfully.

создавала would suggest an ongoing, repeated, or background action, like was creating or used to create, depending on context.

So:

• Она создала новый проект. = She created a new project. / She has created a new project.
• Она создавала новый проект. = She was creating a new project.

Yes, Russian word order is relatively flexible because case endings show grammatical roles.

The neutral, standard order is:

• Она создала новый проект.

But other orders are possible for emphasis:

• Новый проект она создала. = It was a new project that she created.
• Создала она новый проект. = more marked, often conversational or expressive

Even though the order can change, the most natural default for learners is usually subject + verb + object.

Yes, often you can, if the subject is clear from context.

Russian frequently drops pronouns when they are not needed:

• Создала новый проект.

This can still mean She created a new project, if everyone already knows who she is.

However, она may be included:

• for clarity
• for contrast
• for emphasis

For example:

• Она создала новый проект, а он только обсуждал идеи.
  • She created a new project, while he only discussed ideas.

The stress is on the last а:

• создалá

That stress is important. A rough pronunciation guide is:

• sa-zda-LA

And the whole sentence is approximately:

• aná sa-zda-LA NÓ-vyy pra-YEKT

More precisely:

• Она → stress on the last syllable: онá
• создала → stress on the last syllable: создалá
• новый → stress on the first syllable: нóвый
• проект → stress on the second syllable: проéкт

Russian has no articles, so it does not have direct equivalents of a/an and the.

That means:

• Она создала новый проект.

could mean:

• She created a new project
• She created the new project

depending on context.

Usually context tells you whether the noun is definite or indefinite.

The dictionary form is создать.

That is the infinitive, meaning to create.

So the sentence breaks down like this:

• она = she
• создала = created
• новый = new
• проект = project

When learning Russian verbs, it is useful to memorize both aspect partners:

• создать = perfective
• создавать = imperfective

Yes. Новый just adds the idea new.

So:

• Она создала проект. = She created a project.
• Она создала новый проект. = She created a new project.

The grammar is the same; новый is simply an adjective describing проект.

It is in the accusative case, because it is the direct object of the verb создала.

The verb создать takes a direct object: you create something.

So:

• она = subject
• создала = verb
• новый проект = direct object in the accusative

Because проект is masculine singular inanimate, the accusative looks the same as the nominative:

• nominative: новый проект
• accusative: новый проект

That is why the form does not visibly change here.