Thank you! That's definitely the one! Radio Shack rings a bell, and my version was definitely blue, so it must've been a blue Radio Shack re-badged one. Everything else is exactly the same as the o ...
My first LCD game was around 1986/87, and I think it might have been called "Hunting". The case itself looked very similar to this, except with less buttons:
http://www.handheld ...