I could not get the hang of the jump smash mainly the fact that the smash is disabled when you run low on energy so I'd try to smash something and end up just crashing into it and dying. That's more just getting used to the controls though.
The aesthetics are one of my favorite parts though. I love the colors, and the stains. The enemies are simple but take some time to understand what they are but once you get it, it all makes sense. Fun game overall.