This is pretty fun but it seems like the boss was designed with the first ability in mind and the other two were slapped on top of it. I do not believe just this boss is a good demonstration on how the other abilities work as a lot of stuff like the wedges, I assume were designed with the click mechanic in mind.
I also believe the spinning attacks should move during their ghost phase to give the player an idea on what direction the bars will be spinning.
I think this is a fun concept but the extra abilities should have some dedicated bosses made, or at least adjust more of the current boss to adapt to their play styles.
NOTE: I've beaten the boss with the Default and Ghost ability but have not gotten the dash ability, but if CreepinBro is to go by, the wedges are a big fault as well.
I do think the Ghost ability has potential and can be a good challenge, but some design choices do not work in its favor as mentioned earlier. Hopefully this does not come off as too harsh. and can be improved in the final game.
NOTE 2: Beat the Ghost ability again and unlocked Dash, again, I believe it suffers from the same issues as ghosts though personally I think Ghost is a more fun attempt exempting the main Click play style and the Dash is nearly impossible to dodge the wedges.