Cassette inlay cover
From Wikipedia:
Wriggler is a Spectrum and Amstrad maze game published in 1985 by Romantic Robot. […] Wriggler is based around maggot racing other maggots. The player controls a maggot and has to escape a maze consisting of 256 screens.
The title on the cover uses Glowworm (Mecanorma, 1975). “Romantic Robot” is in Sinaloa (Letraset, 1974). Its R also appears for their logo.
Title screen with a freely drawn “wriggler.” (with similar highlight effects as in Glowworm) and a bitmap rendition of Sinaloa
Screens with the various levels on the cassette inlay, labeled in all-caps Univers
Cassette label