Managed to make a friend, kill all the mermaids and eat the victory egg.
I'm a sucker for surrealist stuff, so I loved the style of your demo, I think you managed to capture the mother aesthetic well. All the attack effects were great, especially ESP spoonbending and the blitz attacks of the mermaid middle sisters, those were cool. Some neat "bonus" stuff like first-person mode too, lots of stylish mechanics. The only thing I'd note would be the balance, but you already mentioned that in the description. ESP spoonbending with its 20 damage to all mermaids took care of the final boss in three hits. Unlike the description predicted, nothing was broken though, everything worked as expected.
All-around very good, I've got no real complaints or bugs to report here. Keep up the good work!