Yes probably because this one had a troubled history and continuous delays until finally released in 1986 (when Mattel Electronics was no more) so yes other early titles like Night Stalker, Astrosmash, Lock'n'chase, etc.. might definitely sound more familiar and popular especially for the kids of that era who actually played the real thing.
But I played Thunder Castle a couple months ago -first thanks on my brother on a PS2 'intellivision lives' and the week later on the actual physical Intellivision console wow- and I though I absolutely had to make a Pico-8 remake; possibly trying to fix a few details that appeared to make the original game frustrating at times.
I'm still curious to know from people who played the original one, let's see...
Thanks a lot merx for playing! 🙏