This is by far my favorite entry in this jam.
Gameplay: Very fun. The control is smooth. The map, with the enemies, is fun to navigate around and battle. The objective is clear even without direct text.(something I have plenty o' troubles with) The boss pattern is a bit simple for my taste, but given it's the first boss, it probably better like this. Also the gameplay switching reminds me of blaster master, I like that.
Graphics: Excellent. Very good readability. The player design looks so nice I kinda want to see a character sheet. Not very fond of how some enemies are basic shapes, but what do I know.
Audio: I'm not very keen about audio, so let's just say everything sounds good, both sfx and music.
NES Feel: Perfect, I don't even know what I can say. Accidentally think I was playing on an emulator for a sec.
20/20, hope you develop it to a full game