Great idea and very cute little creatures! I love how they stare at you and sometimes move their eyes around, it makes them look like they are constantly wondering what I'm about to fail next.
It wasn't clear to me at which distance the creatures would react to the mouse. I struggled with the yellow ones, it seems like they always launch full speed but if you click just a few pixels too far away, they don't react at all. I think a "further away = less speed" mechanic would've helped there.
The yellow ones are also pretty bad at rolling (well, they are triangles) which caused them to jump into the air a few times when I wanted them to slide along the ground. This was quite frustrating, they always jumped right into black creatures.
I also feel like automatically resetting the level / going to the next one would help a lot, currently it is a bit annoying to do the extra click. Also there's no indication that a level is no longer possible, I spent a lot of time getting three yellows one through the course without realizing I needed four :confounded: