Thanks for playing it!
Yeah, the key thing I noticed about the heavy attack, is that I should never have called it that. 😅 Another dev played through my game and we talked about it, and we decided it should have been called a "swing" attack. It's got a wide range so you hit more enemies in an arc, and it has higher knockback.
It's really surprised me to see how the name of the attack made all the difference. Because people would use it and see it did the same damage, but was slower, and then write it off as being a less effective version of the normal attack. All because their expectation was that it was supposed to do more damage. (Lesson learned, I've got to be more careful with how I label things) 😅