Thank you for your reply :D. I’ve been worried about the game levels being unfair for a long time too. The game I’m making is a “side-scrolling” game, which means most obstacles come from the right side. It’s easier to make players move horizontal than vertical in this type of game.
Right now, I’m thinking about changing the direction the screen moves in the game, but I don’t know how to do it yet (´_ゝ`). If you have any ideas on how to make players move up and down more, please share them with me! If I think your idea works, I might add it to the game after this GameJam is over d(`･∀･)b.