It's a novel concept, and you're the only jam entry I've played so far that actually includes a transformation sequence which definitely earned points. The story may be minor but it gives enough context and involves player interaction (ie it's not just a cutscene), so I enjoyed it!
Combat though is... clunky. It's not clear when enemies attack you, so you have to keep them at their distance, which is trivially easy by spamming the ranged attack. Though the melee seems to have a three-hit combo with a pause in which the enemy can slip an attack in, the ranged attack does not, and can be fired fast enough to keep an enemy in permanent stunlock. This is how I killed the final boss. Notably, if an enemy is in the hit stun animation, it also blocks them from their death animation, so I kind of wound up standing there spamming Y for quite a while...
(the ranged attack projectile also moves at the exact same speed the character does, which feels a bit... odd if you fire it and then start moving forwards)
I initially thought there was no 'dodge' mechanic until I realised you can actually jump on enemies with the lack of collision damage. It's a fun touch, I quite like that, honestly. It was an 'aha!' moment when I realised I could jump onto and over the slime-face things.