Take all the time you need. Also, heres a couple more ideas:
Donut (with slider)
X ray
Docking (cock fucking)
Null bulge (with slider)
Cum
Maybe some kinda hand that grabs the body parts instead of just a cursor (perhaps with slap toggle?)
girthier cock sliders.
sex toys (plugs, vibrators, anal beads, dildos, etc)
Arms n legs that are anchored when moved around.
Zoom in and out buttons.
I'll think of more later