Amazing! You would've gotten a perfect score from me if only the music had looped!
I was really surprised at the level of care put into the dialog system and story. (so far) Makes me wish there were more and really scratched that Megaman Zero itch without being as frustrating.
The controls are really tight and make it a treat to play, however it was a little awkward for me having the melee and shoot keys separated by the jump key.
I'm not even going to mention the sprites because I'm sure everyone else will comment on how simply awesome they are!
Other than that I can't really find any faults with it. (being in its early stages and all)
By the way, I found your panda mech easter egg :) Putting platforms in a way that make the player want to explore, like in the secret area, is one of the keys to making a great Metroivania game. And you nailed it. Bravo!