As noted in the writeup, Squad is part of a triptych of interpreters working within the same constraints; the other two interpreters are Applejak[0] and Bulb[1].
Hey Rodger! The simplicity of Applejak inspired me to work on my own toy APL in the k family and I've really enjoyed it so far. Optimizing for cache coherency and linear memory layout has been the most fun I've had programming in a few years. Keep up the great work!
[0] https://internet-janitor.itch.io/applejak
[1] https://internet-janitor.itch.io/bulb