You can set initial parameters for the simulation here. Since orbiter type, to init time. You can play with orbiter forces (in track -normal to planet-, radial -velocity direction- and out of plane -h direction-), to simulate different thrusts in the orbiter.
Welcome to Dromobile. To change slide just swipe right, left, up or down (in mobile). You can also use the arrow buttons in the down-right corner.
Use the selection buttons (up center) to change controls in the left. You can also change values in orbital parameters (up right) when simulation is not running.