Its really cool what a simple change as executing basic platformer controls into a 2 button job does for the game experience. Executing a jump and attack felt like an accomplishment! It might be interesting to incorporate cooler moves with a longer combo if you decide to update this later on.
I do think the hard reset to the beginning is a little too challenging, a health system might have been a little more forgiving, especially since the sword/spike thing can kill you.
The gun shot sound is oddly satisfying and familiar, overall, good job on the game :)