From the old ZX Spectrum game Ant Attack (1983) here is the city of Antescher. Orignal game and design by Sandy White.

I've included glass blocks to help you climb some of the 2 block high jumps that the original game characters used to be able to jump onto. They could fit through a 1 block gap AND jump 2 blocks high. Boy, those little guys were nimble!

The idea of the game was to fight your way past giant ants to find and rescue your boy friend or girl friend and it was very popular in its day. Have a look:

www.youtube.com/results?search_query=spectrum+ant+attack&oq=spectrum+ant+attack&aq=f&aqi=g-m1&aql=&gs_l=youtube.3..0i5.2672.5198.0.5624.10.10.0.0.0.0.455.1645.2j5j2j0j1.10.0...0.0.ZUxReZM3gx4