This is a good game! Fighting with the goo is satisfying and the art is very cute, it's the type of game you feel comfortable playing
In my opinion, visual feedback would make the game feel even better, like screenshake and other cool effects. Sometimes I couldn't tell if I hit an enemy correctly or I couldn't understand how was my HP, so I think making it visually better would be great.
Congratulations on finishing the game, great work!