Creative Help with project

I'm currently working on a game that is supposed to be similar to Doodle Jump, the link is here if you want to check it out.

I am planning on adding in most features in the original game (talking about subsections or situations that can occur while playing, for example, powerups) but I also want to add some of my own. I already have a few ideas on what to do but if anybody has an idea I'd love to hear it.

What about some sort of powerup that you can unlock? Like one that is permanent, but you have to reach a certain height? Maybe a slight jump boost, a double jump, or something like that.
Does that help?