Turrican being a robot, and the developer being from Germany leads me to believe it may have been inspired by NES Probotector[1] rather than Contra. PS, watching that now I know the struggle of 50hz gamers playing slow games was real... yikes.
That's pretty funny. Although, to be honest, I think a lot of the shareware platform games from that era were seen as low budget knock-offs of more famous games on the consoles and 8/16-bit home computers.
0. https://www.youtube.com/watch?v=P7jP0qQgL-c