Interesting, I like the thought behind that decision for sure! Once I play it through fully, I am sure I will understand this, don't worry!
EDIT:
Just finished playing it! I broke the map...
Super fun now that I understand that shooting from different sides influences what type of bullets are shot. Super fun! Pretty tough, too!
Feedback:
-sometimes the same enemy would have a different number of life points. Sometimes two, sometimes 4. Something to look into.
-One of the enemies that hits you deals two hearts of damage. Not sure if intentional or not. Great game, cool idea for sure!