>sound-FX (even a CPC sounds better)
They sound effects are fine AFAICT. An Amstrad CPC can only do 5-bit sampled sound in mono, whereas Worm Wars uses 8-bit sampled sounds and supports stereo (see http://en.wikipedia.org/wiki/Amstrad_CPC#Audio).
>Requesters (when quitting) have black gadgets with black text.
Apparently this only happens on planar screens, so you might like to try with other screenmodes. Whether this is a Worm Wars bug or a MorphOS bug has not yet been determined.
>gameplay, must read manual to know what I'm suppose to do
Did you try on Easy mode (the default), it clearly explains what to do ("Collect numbers 1-9 to clear level"), and gradually introduces the various creatures and objects. I don't know how it could possibly be made more obvious.