Thanks for trying it out, and for the comment! Just to be clear, though, looking up does not make you jump any higher; jump height is purely determined by how long you hold the jump button down. And the lamps do light up the player a little bit when you're right next to them. And I tried to include a description of the mechanics and a little cheat sheet of controls on the itch page description, but maybe it could be more detailed.
I totally agree about the lack of a tutorial; that's one place I really wish I could have done a better job. I personally found it much easier with a gamepad (or on the actual Game Boy) than with the keyboard, but maybe that's just me. Thanks again for trying it out!