I guess it is not very obvious, but there are cubes above every character, they go from white ->green->yellow->red->dead. (was the quickest way I could think of to do it)
yeah, it is not that I don't have sounds, it is that I didn't have time to get it into the game, I added the extra enemies in the last 15 minutes (and thus the third enemy arrives 3-4 turns too late).
anyway, I appreciate the feedback