Thanks again
I'm probably updating it this weekend (checking if there are serious bugs).
Here's another idea - "Pitch bend tool" (diving deep into the horrors of decaying sine um..curves).
(adjusting velocities in this gif)
I'm running out of axis:
1) lmb down+move mouse in y-coord: set wave height
2) lmb down+move mouse in x-coord: set decay
3) lmb down+move mouse in z-coord (towards floor/roof): do something
4) ? keeping lmb firmly down while pushing mouse through time: set wave length (number of sine waves)