As everyone has already said, it's a decent concept, needs a lot of work. The most annoying thing is the controls, specifically the mouse aiming which makes the game just obnoxious to play. This is my biggest complaint, as everything else I'm about to mention would probably be mostly bearable if it wasn't for this. Things like shielding/parrying become especially irritating to do thanks to this.
Enemies going off screen and out of reach making them more annoying then they would be otherwise (Especially the cheerleaders).
Also, I would suggest making the energy bar go up faster outside of combat. Players can already wait between sections, it's not gonna change anything outside of making the game less tedious.
The final boss. You can probably guess why considering my first complaint.
Edit: Now that I think about it, I do think some of these complaints were poorly worded (And last one just unnecessary.), even if I still agree with them pre 0.2. With that being said: Oh my god do I love this game now.
Few weird kinks (and not the fun kind) to point out. Sometimes the Spankatron's movement can get locked to a single direction. Not sure what causes that to trigger, but besides that? Keep up the good work.