I was able to beat all 6 of my other challenges, so here's 6 more:
- Rocket jump off of 3 explosive barrels at once without dying
- Jump on top of a Delivery Drone and pin it to the ground
- Climb one of the giant buildings in the background
- Beat my score (impossible)
- Get 20 points without killing a drone
- Rocket jump off of a barrel, and then rocket jump off of another without touching the ground