Dr. Hirudo has let us know ( http://www.pdroms.de/phpbb/viewtopic.php?f=6&t=2706 ) that he released an updated version of MazezaM (feel free to leave feedback in the PDRoms webboard).

The goal of the game looks simple – to pass from the left part of the level to the right, by sliding the walls and making corridors between them, which you can pass through. Once you get to the right part of the level, the character goes through straight corridor to the next level. The game gets harder with every level passed. But the motivation of the player to go to the next level raises as well. MazezaM is also available for other various platforms with wide range of features on every different hardware.

Release notes:

I have made the new release of MazezaM for Colecovision, compiled with the newer SDCC compiler. It is now faster and with two more levels. But the Gameboy version is still better, with smoother animation of the character.

http://hirudov.com/others/MazezaM_CV.php