You should define some scaling factors.
Like: normal person (1.8m) is 70 quants high.

Else the levels are not easily interchangable
if everyone uses a different scale.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html