With my Humble Bundle purchases, I now have both the PC and Android versions of Waking Mars. I started playing it on the computer, but changed my window manager and cannot continue there due to incompatibilities. So I installed the game on the phone.
In the computer version, I could launch seeds while in the air (using the right mouse button IIRC). On Android, the only way I have found to fly around is to tap a point in the direction I want to go to, and the only way I have found for launching seeds is to choose a seed from the menu, then tap in the direction I want the seed to fly. So far, I have not been able to launch a seed from flight, I always had to stand on firm ground. But from memory, I would say that the computer version allowed launching while I was floating in the air.
I am at the "vertical shaft" level right now, and I just can't find a way to get through it. Stuck at 45/70 biomass, I have seeds, but all the remaining fertile ground patches are on the vertical wall, and I have no place to stand in order to launch the seeds. I wonder if there is a control I overlooked which will allow me to launch the seeds from float, whether I oversaw some opportunity for growing more biomass, or whether I am supposed to be dexterous enough to launch the seed by selecting-and-tapping during a free fall.