What I say is in genuine hope that it helps you improve your game design(please don't take it personally)
I can tell this is probably one of the first games you have made and it's not bad for someone even if they had experience, voice acting is better than certain triple A games and the story (despite being short) makes sense.
Gameplay issues:
the maps are too open which makes them long to traverse and gives far too much breathing room to the player.
from what I've seen the enemy types are all very similar aside from hitboxes, making them all have unique and memorable attack patterns will add more life to the combat
Technical issues:
Games not libre and not source available which makes it less appealing
Most enemies feel untextured
ps. if you are looking for a game engine that will give your games better performance you might wanna look into godot. Also godot will never make you pay them even if you earn over 100k a year ;).