Space Tag is a submission to the "Godot Wild Jam 75 - Reflection."

Art by Logan S. (Megazumi World)
Music by not_carlos
Programmed by Rakudajin, Xantur
Game design by Rakudajin

It's a grid turn-based mirror-laser-tag game in space! 

Full screen is highly recommended! (F11 in Chrome on Windows).

The tutorial is in the game and also here in the screenshots. And here's a PDF.