Now that you have a fully restored 128K, you should try TIRATOK by deMarche, a demo from 2019 that I'm still in disbelief that it's possible on real hardware (I know it is, but it's too damn impressive):

  * https://www.pouet.net/prod.php?which=83538
  * https://www.youtube.com/watch?v=uGLa1qqMnhE

Also worth trying on real hardware is "Aliens: Neoplasma", also from 2019. That and "SkyNet: Road to 1984" from last year. These two games really show how alive the Spectrum scene is, and they are honestly good games.

  * https://sinc-lair.itch.io/aliens-neoplasma
  * https://hicksretro.itch.io/skynet-road-to-1984