Я всё сделал отлично.

Because всё means everything or it all, while все means everyone or all people/things in a plural sense.

In Я всё сделал отлично, всё is the object of the verb and means everything:

• Я всё сделал = I did everything
• Все сделали = Everyone did it / They all did it

A useful contrast:

• Я всё понимаю. = I understand everything.
• Все понимают. = Everyone understands.

Also, всё is often written as все in casual typing, but the correct spelling here is всё.

Сделал is the past tense of сделать, which is a perfective verb. It usually means did, completed, or finished doing something.

Russian often uses aspect to show whether an action is seen as:

• completed / result-focused → сделать → сделал
• ongoing / repeated / process-focused → делать → делал

So:

• Я всё сделал отлично. = I did everything excellently / I got everything done very well.
• Я всё делал отлично. would mean more like I was doing everything excellently or I used to do everything excellently, focusing more on the process or repeated behavior.

In this sentence, the speaker is talking about a completed result, so сделал is the natural choice.

In the past tense, Russian verbs change form to agree with the gender and number of the subject.

With я, the form depends on who is speaking:

• Я сделал = a male speaker
• Я сделала = a female speaker
• Мы сделали = we did

So the sentence Я всё сделал отлично strongly suggests that the speaker is male.
If a woman says it, she would say:

• Я всё сделала отлично.

Here отлично is an adverb. It describes how the action was done.

• сделал = did
• отлично = excellently / very well

So it modifies the verb, not a noun.

Compare:

• Он отлично поёт. = He sings excellently / very well.
• Она отлично написала тест. = She did the test excellently.

Do not confuse this with отличный, which is an adjective:

• отличная работа = excellent work
• отлично сделал = did excellently

Yes, Russian word order is fairly flexible. The basic version here is neutral and natural:

• Я всё сделал отлично.

But other orders are possible, depending on emphasis:

• Я отлично всё сделал. = emphasizes how well
• Всё я сделал отлично. = emphasizes everything
• Отлично я всё сделал. = can sound more emotional or contrastive

Russian word order often affects focus rather than basic meaning. For a learner, Я всё сделал отлично is a good neutral pattern.

Yes, very often. Because сделал already shows that the subject is I and also masculine, Russian can drop the pronoun when it is clear from context.

So you may hear:

• Всё сделал отлично.

This still means I did everything excellently, if the context makes that obvious.

Including я can add clarity, contrast, or emphasis:

• Я всё сделал отлично, а он — нет. = I did everything excellently, but he didn’t.

Yes. In this sentence, всё is the direct object of сделал, so it is functioning as the accusative form.

With всё, the nominative and accusative look the same, so you do not see a change in form:

• Всё готово. = nominative, Everything is ready
• Я всё сделал. = accusative, I did everything

So even though the form does not change, its role in the sentence does.

It is pronounced approximately like vsyo.

Important points:

• в
  • с gives a cluster like vs
• ё is pronounced yo
• The stress is on ё, because ё is always stressed

So:

• всё ≈ vsyo

Learners often misread it if it is written as все without the dots, but in this sentence the meaning is still everything, and the pronunciation remains всё.

Both are possible, but very well is usually more natural in everyday English.

So:

• Я всё сделал отлично. = I did everything very well.

A more literal translation is:

• I did everything excellently.

In real usage, отлично can sound like:

• great
• excellent
• very well

depending on context.

It could, depending on context, but that is a slightly freer translation.

The core meaning is:

• Я = I
• всё = everything
• сделал = did / completed
• отлично = very well / excellently

So possible natural translations include:

• I did everything very well.
• I got everything done really well.
• I handled everything excellently.

Perfectly is a bit stronger than отлично, so it may work in some contexts, but it is not always the most exact choice.