thank you for the answers
still, they raised one more question for me. i presume it doesn't matter in what programming environment the demo is built. never thought about this to be honest, but i could build it myself in flash say one scene with the speech and interactions. should be a bit of a challenge but i think i can do it.
now for the question: say i finish the demo, cook a nice proposal document and get an interview with whatever company. they reject it. 2 years later my idea comes out, built by the ones that rejected it. is this possible? and if it is, is there a way to avoid this?
L.E.: maybe if i post the progress here, to be public, then i'll have proof that it is my work.. is it a legally viable proof?
also, i could try AGS