This did a good job of capturing the retro feel and look. The sprite art felt very well done.
I had a bit of trouble with the enemy hit/hurt boxes. Sometimes we both took damage, sometimes something that looked like a hit just hurt me, and sometimes I would run straight into some of them and they'd get hurt. It was also very hard to tell when some enemies were planning to jump, leading to a bit of frustration. The enemies felt a little inconsistent, but other than that, good entry!