The Choice of Assets are very good, the music enemy and player all mix with each other well.
Suggestions:
Enemy should have some hit feedback(Sound, Color Flashing on there sprite)
Player weapon was so low range.
Collision Mechanism were snappy, it took me a while to climb that first part
Player Hurt can have same invincibility frame time, like you can't be hit for a second. jumping on spikes felt so helpless and frustrating