Though I saw this same puzzle in The Lost Mind of Dr. Brain, which came out in the 90s, your addition of keys, stars, and a timer helped to add some depth and allow the puzzle to stand on its own. Also, since it is rather difficult to find a machine that can run software from the mid 90s, I am very happy to see this puzzle appear in a more accessible form.
In Dr. Brain, the character followed the mouse, which took away some of the skill requirement involved in navigating corners. Your choice of arrow keys worked well, but I preferred being able to use the mouse, so I could concentrate on the maze more easily.
Thanks for your work!