I really appreciate the option to change the movement type because I was struggling a lot with the isometric movement.
I think that, not being the focus of the gameplay, the platforming "mechanic" wasn't a great addition to the overall experience of the game, nor was the fact that you can fall from the stage.
Also, I think it would be better to have fewer bells with clearer effects.
I struggled to realize what to do when a bug/plant monster appeared, even taking into consideration that there is just one thing you can do (ringing the bell).
Fun and cool idea either way!