Pushover is a faithful reimplementation of the game with the same name published in 1992 by Ocean. It contains the original levels. The graphics and sound are very similar when compared with the original game.

http://zx81.zx81.free.fr/serendipity/index.php?/archives/469-Caanoo-Pushover-PushOver-for-Caanoo-v0.2.html