Thanks for the feedback! I would agree that the levels are very introductory - I wish I had more time to create more and add some more difficulty as well.
There is music that adapts to in-game functionality so I would recommend having sound on :)
I hid the mouse to avoid confusion where a player might try clicking on the buttons rather than interacting with the character. I can see how it's a little awkward though. Good stuff to consider - thanks again!