The BLRS wiki is a good resource for various Vex mechanisms:
Yellow round disk (from spin up) will probably be the easiest to score. I recommend looking through some reveals on youtube and using them as inspiration. Record sources and what you learned from them in the notebook as research is a step in the engineering design process.
Harvard-Westlake Robotics: BLZ-i Reveal
I’m just wondering, but what is this challenge for?
Just start thinking, and write down every idea you come up with, no matter how silly or ridiculous you think it is. Once you can’t possibly come up with anything else, start going through the various ideas and assess them by how likely you think they are to work, and how simple they will be to make. Simpler is better, because it will be harder to break and will be easier to fix.
This is a project for a class at my school
If you just have a few motors connected to a realy heavy flywheel connected to a traction wheel you could send stuff flying
that must be a fun class!