I've just downloaded and unpacked the tarball in my home directory. The animation speed defaults to slightly less than light speed, and the view image is half the size of the palm of my hand.
Zquest-l doesn't seem to have an option to set animation speed (or I just don't recognize is as such).
When I select fullscreen mode, my screen goes black (fullscreen) with the same small image centered on the screen.
How do I adjust animation speed and image size?
For other Linux users, there are no installation instructions (it's binary, just unpack it where you want it). There is one dependency: libstdc++.so.6. If you have it, symlink or hard link it to the folder you in which you unpacked Zelda.