It uses VESA 1.0 for the main menu/debugger/tiny screenshot screen.
If it isn't present, it uses the standard CGA/EGA/VGA text modes.

It uses standard CGA/EGA/VGA MODEQ 256x240x256 color mode
for the games themselves.

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I found out that VESA 1.0 is being used because in Windows 7 32-bit,
the programs that use VESA 1.0 exit immediately with garbage
in the screen.

I found out that it uses standard VGA because I could run it with
full color under DOSBox with the vgaonly setting.