koma ha tokeimawari ka hantokeimawari ni ugoku.

It is read:

こま は とけいまわり か はんとけいまわり に うごく。

In normal Japanese writing, it would usually appear without spaces:

駒は時計回りか反時計回りに動く。

駒 usually means a piece, counter, token, or some small movable object, especially in games or mechanical contexts.

Depending on context, 駒（こま） can also mean a spinning top. So the exact English word depends on what kind of object the sentence is talking about, but the grammar of the sentence stays the same.

は marks 駒 as the topic of the sentence.

So the sentence has the feel of:

As for the piece, it moves clockwise or counterclockwise.

This is very common when Japanese is describing the properties, behavior, or general action of something.

If が were used instead, the nuance would shift more toward identifying what moves, rather than talking about the piece as the established topic.

They are compound words:

• 時計 = clock
• 回り = turning, rotation, direction of turning

So:

• 時計回り = clockwise
  Literally, in the direction a clock turns
• 反時計回り = counterclockwise
  Here 反 adds the idea of opposite or reverse

These are very standard Japanese words for rotational direction.

Here, か means or.

So:

時計回りか反時計回り = clockwise or counterclockwise

This is not a question in this sentence.
Japanese か can also be a question marker, but that is usually when it appears at the end of a sentence.

So compare:

• 時計回りか反時計回りに動く。 = It moves clockwise or counterclockwise.
• 動くか。 = Will it move? / Does it move?

The に applies to the whole phrase:

時計回りか反時計回りに

Japanese often places a particle only once at the end of a coordinated phrase like AかB.

So this means:

in a clockwise or counterclockwise direction

You do not need to say 時計回りにか反時計回りに here.

Here, に marks the direction/mode of the movement.

So:

• 時計回りに動く = move clockwise
• 反時計回りに動く = move counterclockwise

You can think of に here as turning the direction word into something like an adverbial phrase that modifies 動く.

It is not marking a destination in the sense of go to a place. Instead, it marks the way the movement happens.

動く is an intransitive verb meaning to move.

That means the thing itself moves:

• 駒が動く = the piece moves

The transitive counterpart is 動かす, meaning to move something:

• 駒を動かす = move the piece

So in this sentence, the piece is being described as moving on its own or as the thing undergoing movement, so 動く is the correct choice.

Because there is no direct object.

With 動く, the thing that moves is not marked with を. It is the subject/topic of the sentence.

Compare:

• 駒は動く = the piece moves
• 私は駒を動かす = I move the piece

So if the verb is 動く, you should not expect 駒を here.

Normally, no.

AかB means A or B, so it presents alternatives. In this sentence, it means the movement may be clockwise or counterclockwise, depending on the situation.

It does not normally mean the piece moves in both directions at the same time.

No. Standard Japanese is normally written without spaces:

駒は時計回りか反時計回りに動く。

The spaces are usually added only in teaching materials to make the sentence easier for learners to read and parse.