Upload the three ROM images to power on. They're stored locally so you only do this once.
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-- fps
Load a .PRG or drop one on the screen.
Type on your keyboard — full VIC-20 matrix mapped.
PgUp=RESTORE · Esc=RUN/STOP · Home=CLR/HOME ·
Tab=C= (Commodore) · Arrows=cursor keys (↑/← auto-add SHIFT).
On mobile, tap the screen to focus.