I love the pixel art in this game, and how juicy it is! You have great screen shake! This is a nice simple jam game scoped appropriately and polished. However it is very difficult and minor adjustments make a HUGE difference.
If I could give you only one suggestion to improve this game, I would increase the variety of the sound effects. The same two played so frequently can be a little tiring. If I only have a few sounds appropriate for an action, I like to pitch shift them by a random amount each time they are played. That way even if they're the same effect the slight variation in pitch is nicer on the listener. I typically start with the random range being 0.95-1.05 of the sound's pitch, but you have to tweak the range for each effect so it sounds good.
Awesome job!