لغز جديد في غرفة الهروب.

A careful MSA pronunciation would be:

lughz(un) jadīd(un) fī ghurfat(i) al-hurūb(i)

In normal pause pronunciation, learners often say it more simply as:

lughz jadīd fī ghurfat al-hurūb

A few pronunciation notes:

• لغز = lughz
  The غ is the deep, gargling sound gh.
• جديد = jadīd
  Stress falls on the last syllable: ja-DĪD.
• غرفة = ghurfa by itself, but in this sentence it is connected to the next noun, so you hear ghurfat al-hurūb.
• الهروب = al-hurūb
  The ه is a normal h sound.

It can work as a headline-style phrase or a nominal expression, not necessarily a full everyday sentence with a verb.

Literally, it is something like:

A new puzzle in the escape room.

Arabic often uses short verbless expressions in titles, headlines, labels, game prompts, and signs.

If you wanted a fuller sentence, you could say things like:

• هناك لغز جديد في غرفة الهروب. = There is a new puzzle in the escape room.
• يوجد لغز جديد في غرفة الهروب. = There is a new puzzle in the escape room.

So the original is perfectly natural as a short caption or announcement.

Because they are indefinite.

• لغز = a puzzle / a riddle
• اللغز = the puzzle / the riddle

And because جديد describes لغز, it matches it in definiteness:

• لغز جديد = a new puzzle
• اللغز الجديد = the new puzzle

In Arabic, adjectives usually match the noun in:

• definiteness
• gender
• number
• case in fully vocalized formal Arabic

So since لغز is indefinite, جديد is indefinite too.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• لغز جديد = literally puzzle new
• natural English: new puzzle

This is one of the most important word-order differences from English.

More examples:

• كتاب مفيد = a useful book
• بيت كبير = a big house
• الولد الذكي = the smart boy

Because this is an iḍāfa structure, often called a construct phrase.

غرفة الهروب literally means:

• room of escape
• more naturally: the escape room

In an iḍāfa:

1. the first noun does not take ال
2. the second noun can be definite or indefinite, depending on the meaning
3. the whole phrase gets its definiteness from the second noun

So:

• غرفة هروب = an escape room or a room of escape
• غرفة الهروب = the escape room

That is why غرفة does not take ال here.

في means in.

So:

• في غرفة الهروب = in the escape room

It introduces a prepositional phrase showing location.

A useful thing to remember is that nouns after prepositions are formally in the genitive case in fully vocalized Arabic:

• في غرفةِ الهروبِ

Even if case endings are usually not written in normal text, the grammatical relationship is still there.

Because غرفة ends in ة (taa marbuuTa).

When a word ending in ة is said by itself in pause, it is usually pronounced like -a:

• غرفة = ghurfa

But when it is grammatically connected to another word, especially in an iḍāfa, the t sound is pronounced:

• غرفة الهروب = ghurfat al-hurūb

This is very common:

• سيارة alone = sayyāra
• سيارة الرجل = sayyārat ar-rajul

It can mean both, depending on context.

لغز often means:

• riddle
• puzzle
• sometimes even mystery in a broader sense

In the context of an escape room, puzzle is usually the best translation.

So in this sentence, a learner should probably understand لغز as:

• a puzzle
• or a riddle/clue-like challenge

Because the phrase means the escape room, not just an escape room.

Compare:

• غرفة هروب = an escape room
• غرفة الهروب = the escape room

Since the second noun in the iḍāfa is definite, the whole phrase becomes definite.

So في غرفة الهروب means:

• in the escape room

not just

• in an escape room

لغز is masculine singular.

So the adjective must also be masculine singular:

• لغز جديد

If the noun were feminine, the adjective would change too. For example:

• قصة جديدة = a new story

Here:

• جديد = masculine singular
• جديدة = feminine singular

So جديد is the correct form because لغز is masculine.

In fully vocalized MSA, the phrase would be:

لُغْزٌ جَدِيدٌ فِي غُرْفَةِ الْهُرُوبِ

Case-wise:

• لغزٌ = nominative indefinite
• جديدٌ = adjective matching لغز
• غرفةِ = genitive after في
• الهروبِ = genitive as the second noun in the iḍāfa

In everyday reading and most printed Arabic, these endings are usually not written, so you normally see:

لغز جديد في غرفة الهروب

Some parts can move, but the basic noun phrase relationships must stay clear.

The original:

• لغز جديد في غرفة الهروب = A new puzzle in the escape room

You might also see:

• في غرفة الهروب لغز جديد = In the escape room, there is a new puzzle

That version sounds more like emphasizing the location first.

But inside the noun phrase, the order usually stays:

• noun + adjective = لغز جديد
• iḍāfa = غرفة الهروب

So you would not normally say:

• جديد لغز
• الهروب غرفة

because that breaks standard Arabic structure.