"Play the instrument."

Translation: E hoʻokani ʻoe i ka pila.

[Nico838548]

Leaving out the "'oe" shouldnt be a problem right?

[kelii....]

Possible, yes

[rabelon]

This prompt is without subject.

[scarvbarv]

In English, any command to one person has an implied subject. You may sometimes see it written (for the purposes of teaching grammar) as:

(You) Play the instrument.

[Ivitcyex]

It's a command.