After playing your game give the gameplay of being challenging, but unique. It reminds me of Yoshi island for the Super NES for mostly the art style. My main feedback is the light which is challenging when moving the mouse for the light to shine on the key, platform or door while moving the character to navigate the level with the keyboard. Maybe have the light follow you when jump on the spot light that setup a timer of 15 seconds while continue having the scene switch from light to dark to find and locate the platform, door and key. If the timer is up is when the spot light revert back to the original place as you have to jump in the spotlight to start the level over again until it's complete.