Hi Eights,
Thanks for the feedback! You should be able to recover it from the stall simply by pitching down (ie pressing and holding the 'A' key) - it won't pitch down by itself because the program currently holds the aircraft at a constant pitch attitude all the time (unless you adjust it manually by pressing 'A' or 'Z'). These screenshots show how it works for me:
(1) Just stalled (pitch attitude is about 7 degrees or so nose-up, the simulation has a max Cl at 12 degrees AoA):
(2) Recovering (press and hold 'A' until you get 45 degrees(!) nose-down):
(3) Once you're flying again, pitch up (press 'Z') to get back to straight and level:

I plan to add properly-simulated pitch-axis rotation in the future - but this 'pitch-hold' version is quite fun to play with too!
Cheers,
cbl.
I forgot to add - to control the power, press the ',' (comma) key to decrease power, and '.' (full stop, or period) to increase power. On a UK keyboard, these keys correspond to the '<' and '>' keys, although you shouldn't press Shift... (it seemed intuitive at the time
cbl.