ZAP -ZX Spectrum-

 A shooter by Animated Alex

ZAP is a Basic game for ZX Spectrum!

Protect the red planet and zap as many Aliens as possible!!!  When shield falls beyond half way mark zap cyan boss, or the Aliens above the boss to gain a re-charge on shield.

 

 Download, here

Source: https://animatedal.itch.io/zap