What I like the most is the movement. The rocket jump mechanic is very fun and using the dodge roll as a mid air dash is pretty cool.
In regard to the combat, it felt felt more like a target practice. The only times I got hit was because I was goofing around trying to rocket jump inside the "fighting arenas" (don't know how to call them). Also, the enemies didn't have any interesting attack patterns, but perhaps I'm being too critical on this barebones stage of your project.
Overall, it's entertaining to play.