Solid entry all around, had a lot of fun just trying to beat the first level. Overall I think this was a great, well-balanced twist on the original. Having to store up and manage shots adds a nice element of strategy, as well as clearing out a quadrant to get rid of an enemy (at the risk of not finishing it off and leaving them angrier). Music was cool, and I really liked the sound design (though I found shot firing sound effect a little annoying, but I suppose it fits thematically). Movement feels good, and appropriately Pac-Man-ish.
Really, I only have two somewhat minor critiques:
1: The zoomed-in camera view didn't add anything for me. I thought the scrolling effect for the warp was cool, but the zoomed in view just kind of makes it unnecessarily more difficult to plan your movements. The level is the same size as the original Pac-Man, so I don't see what was gained my having a scrolling camera, aside from the cool effect (which still would've worked zoomed out).
2: It took reading the instructions for me to realize that the enemies can take multiple hits when they're angrier. This is telegraphed very poorly, and led to some frustrating moments where I was wondering why my firing wasn't working. On top of this, how am I supposed to know how many hits they can take? Perhaps the sprites change when they're damaged, but if so they're moving too fast for me to tell.
Overall, this is a great entry, though, I enjoyed it quite a bit. Good job!