Thank you very much for the feedback! I may implement a contextual hint system when the jam is done. In the meantime, if you're curious, I created a walkthrough video on YouTube with hints and solutions for each part.
I checked yours out and rated it too! I enjoyed the mechanic of switching the lights on and off (and even found that last sneaky cookie!) The characters are quite cute. About the only issue I ran into was if I died while holding D or A, the character would still be running and I'd immediately die again. Otherwise, the controls felt pretty crisp. Needs sound, but I saw you were planning to add that later. Great work!