Kill the bit program does not work as expected

[Selorax]

The program itself is a classic game for Altair. https://altairclone.com/downloads/killbits.pdf

Steps to reproduce:

1. Open https://wixette.github.io/8800-simulator/ in browser
2. Switch the machine ON
3. Switch to Debug tab
4. Input the following hex string:

21 00 00 16 80 01 0E 00 1A 1A 1A 1A 09 D2 08 00 DB FF AA 0F 57 C3 08 00

5. Switch back to Simulator, click Reset and Run

Expected result: the top 8 address LEDs show a moving light while top address switches invert its state

Observed result: neither top 8 address LEDs nor data LEDs a lit while the program is executed. Switches seem to do nothing.

The program shows the same behavior when input by switches manually as well.