pretty nice and creative game,could be great with some tweaks,my suggestions are:
☆ improving the art with a little bit of shading and adding more color to the scenes,also adding animation instead of it being just a sprite moving could greatly enhance the atmosphere of the game, if you're bad at art i suggest using pixel art it's pretty good and simple!
☆adding a damage counter so the player doesn't die instantly when in contact with a danger element
☆adding a button in the tutorial section that make you able to go back to the main menu without restarting the game
overall it's a very fun and nice game,keep it up!