This game was so satisfying and relaxing to play! I really enjoyed the experience and would love this as a full game.
I think the first strength I noticed was the smooth mechanics. I really liked the platforms that you were able to generate with the flashlight and move. I think this could be polished in terms of the cooldown, like others have said.
The art and music were also huge strengths! I loved the theming and felt it was very cohesive and originally designed as well.
One area of improvement I could suggest is just tiny fixes with mechanics. Jumping on the edge of the platforms allows a double jump, which is a super common error I think almost everyone's platformers had. Another mechanic could be fixing the cooldown as I mentioned earlier, as I see others have suggested some good ideas.
Overall I felt this game was very strong in its design and execution!