_---READ THIS--- Press the green flag. Gauge at top right tells rotation, change that with q,e,a and d. Under that (the purple gauge) tells you the difference between L-Velocity and R-Velocity, change that with LR arrow keys. Bar at bottom right tells throttle, U arrow to fly, ws to change throttle, 2 max throttle, x: 0 throttle and z for -2.5 throttle ( negative acceleration). LAS Does nothing (yet), SPD tells you speed warning (>2.5). TheBlueThing that appears next to the dials means that the value is zero; e.g. 0 direction means straight up. TheBlackThing that appears on top of the speed gauge means that throttle is 0, useful for hovering.
Inspired by kerbal space program.