Okay not sure what the person above is on about but someone on FB pointed me to the solution, here:
https://hirudov.com/misc/MazezaM-40.php
Then I did level 31 all by myself and finished the game, oh yes!
Hi, thank you for your response.
How?! How do I do that? I have just tried every key on the controls... and I have not needed to use this at all to get to the last level
Help! I am hopelessly stuck on level 30 (the last one I believe) in Collectorvision's MazezaM!
It really seems impossible, and there are no longplays on YouTube. Has anyone finished it? Are you able to help? I can provide the password if you would like to have a go (the game is in the Collectorvision vault ROM pack 1).
Thank you so much