Hope you didn't try the WebGL version, that had erratic mouse movement where even I had trouble completing the tutorial with as well.
If it was the download version, the tutorial level was kind of a mistake, sorry for giving your hand too much stress! The game is highly sensitive to mouse movements so very slight moves are all it takes. Controls are kinda intentional, but I guess I could explore a non-mouse option?? In the meantime I've added more description around the controls on the game page. Thanks for checking out the game!