This one should be a little easier than the last but still challenging. I say easier because just beating it should be fine, but speed running it is another story.

The level in question is a boss fighting extravaganza where you can save your progress with a looping checkpoint after each victory. (red coin count saves on checkpoint refreshing.) I'm not sure what difficulty it is yet, but it's at least expert if not super. I tested the ever-loving crap out of it, so everything works smoothly. If you die, you should be able to respawn and try again after 4-7 seconds for each room.

Level code here: JS5-RKF-1KG

Have fun, and don't forget to save by hitting BOTH checkpoints after a room.