I want to pray two rak'ahs for Allah; is it permissible for this to be done audibly?

Daytime prayers are to be recited silently, and night prayers audibly. As for daytime prayers, the recitation is not to be audible except for Friday and Eid prayers. If you pray these two rak'ahs during the day, the Sunnah is to recite them silently; if you pray them at night, then recite them audibly.