I did laugh out loud once (animation when beating the first boss, I won't spoil it for others).
As feedback: on the game page, the color for the font is hard to read on the background. In game, the pixel font M character kind of looks like a H so some of the story names and titles may not be read as clearly for the names you've designed. I has to ESC out to review the controls...I was looking for a power jump key since at first I didn't realize holding space made you jump higher. The controls/movement were not very fluid considering the kind of screen navigation required (especially holding the jump).
I liked the progression on the boss battle. The artwork was really good, sound effects matched the game well. One thing I definitely learned from you is the game title...really makes you want to try it out.