It is a short game. but also hard to master with the mouse because I don't know how far player gets. maybe you should explain or give the player some feedback back when drag the mouse backwards.

Nice little puzzle game, took me a moment to get the hang of, some control listings in the game might have made that easier!  The second level got really hard and really strict with where you can and cannot go, but overall it was a nice little experience.  Good job!