Thank you for your feedback and interest in the game! You have brought up some great points about hitboxes and game elements to look at for polish.
This is a one man project and I am doing my best to manage as much of the development as I can. Some of the animations especially gameplay based ones are over a year old and come from a place of development where I am just seeing if I can make something that even works! I have definitely spent more time and frames on some animations than others. There are a lot of animations to be replaced as they are completed.
I am trying to improve every aspect of the game in development. My current goal is to finish the gameplay levels and then to go back and polish the game once everything I want is in. So of course there will be more enemies, modified level designs, fully realized bosses and more! I'm also currently working on the tentacle scene, who's going to put a tentacle in a game like this and not use it!
Thank you again for your input and interest, I am doing my best and I hope you enjoy the final project!