Excellent game, I love this type of puzzle game! Reminds me of the turtle program from back at school. I managed the first three levels with a little trial and error, but I'll be coming back to finish off the last two levels - they won't get the better of me!
Others have mentioned about a reset button as a quality of life feature, which I definitely would put a vote on. None of that really detracts from an otherwise great game though!