south paradiso

This is a practice painting for what may become the best thing that's ever happened to me art-wise. This is with leather acrylics, which are more liquid than regular acrylics. I paint with watercolours, not acrylics, so any critique, especially regarding technique, is highly appreciated.
The canvas is 4"x6"
The "assignment" was to do an Hawaiian landscape with a waterfall. This is the piece in progress, maybe 70%, maybe 80%.