Dia melihat kami bermain-main di taman.
Meaning: She sees us playing around at the park.

She sees us playing around in the garden. = not accepted, reported

She sees us playing around in the park.

Not sure we really need the word "around" with "playing". But be could say "horsing around in the park".

Bermain-main can be just "playing". "Playing around" is unnecessary.