Post-release update
Version 1.2 adds an indicator for your ship. Someone pointed out in the comments that it was missing, and it was something I was thinking it could be of use anyway. The graphic I ended up using is one of the target icons from Ardentryst.
Regular version:
https://pyweek.org/media/dl/19/onpon4/pacewar-1.2.zip
Low-quality music version: