Fun, I like the gameplay where I have to switch multiple times between the 2 characters to get further in the level. Dev a fun feature!! And the puzzles are made quite well; some are definitely easier to solve than others, but that's what makes it fun!!
But the movement sound gets kind of irritating to me after like 2 levels; maybe you could add a small settings menu to, like, lower the sound of it? Since I now did it manually (on my PC)!!!! And maybe some really simple background music?