Thank you so much. I have no regrets on any of the code I wrote for this one, graphics so-so, but as for the sound effects - yes this is an area I definitely underdeveloped and I'm not even sure why, lol. With a few more hours I'd have cooked up some chonky bassy blasts to accompany the lasers and a suitably epic boom sounds to accompany the player's OTT nuke death explosion.
Thank you for the feedback, the sounds are where I'll pay attention next.