I stumbled across this addictive game on Touch arcade and to my surprise it’s made in Unity.
It’s in the style of ZX Spectrum and has a great game mechanics. It’s also free or was when I got it.
yeah i stumbled over this little gem too 2 days ago. As the ZX Spectrum was my first “real” computer i was immediatly sold to the graphics…
Definitely a great game mechanics too…
Here’s the developers site
BTW:
For another ZX Spectrum related hit from the past, you might follow this link 
(still WIP though)
http://frogsinspace.at/tmp/jetman/Web.html