I think the idea is unique and really cute. Its an interesting little puzzle game that can certainly be expanded on.
There are, however, a few changes that I would like to see happen.
First off, and probably the biggest offender is that the game doesnt give you all of the required information to beat the level. Sometimes the blue and purple nodes are hidden off-screen, and the player kind of has to guess, or try, fail, and try again. I think it would be a lot better if the puzzles all fit on screen fully, and the player could plan out, ahead of time, what they wanted to do. This gives the player more agency and more opportunity to plan their moves.
Overall cute idea, and interesting prototype for something that can become a full-fledged mechanic.