[Spade] Cleanly compiled firmware doesn't boot properly

[creeperlulu]

Describe the bug
Flashing a freshly built Spade (firmware/spade) onto a Sprig hardware will cause the OS not to boot and show a screen with each pixel being random colors.

To Reproduce
Steps to reproduce the behavior:

1. Build Spade from source at [repo root]/firmware/spade with your desired method
2. Flash the firmware on a Sprig which has been just obtained, or flash a Pico nuke file to clear the Pico's memory, then flash your firmware next.
3. Observe how your Spade doesn't boot.

Expected behavior
Spade should show the main menu and ask for game upload.

Actual behavior
A screen with randomly-colored pixels is shown.

Screenshots