Oh my gosh, this is so cool. Awesome, amazing, epic, whatever word you wanna use. Where do I start, uhh...
This game plays so awesomely, it's all so freakin' cool! Shanghai controls super fluidly and has a pretty good variety of attacks (and it seems you're planning to add more?). The enemies are interestingly designed, and the ability to jump turns the combat from a button-masher into a really cool game of hid-&-run and reacting to enemy attack animations (at least for me). I played Normal mode this time, just cuz it took a while a grasp on the controls, but I'll be sure to go for Hard once the update comes out. It feels like I've barely scratched the surface of how to play this game, despite reaching the end of the demo and fighting (almost?) all the enemies.
Sure, there were a couple bugs-- one time an encounter started for an enemy that was on the other side of a wall, and one time Shanghai landed on the ground and then just kinda froze up until she was hit by an attack. Sadly, I don't remember exactly where these were.
The dialogue was fun as heck too, in just about every scene. Not too much to say personally, but it's just full of charm and expressiveness and... everything, really.
Visually, musically... oh my gosh. It's just so so good. The animations, the sprites, the 3d, the fact that the battle maps are just small sections of the dungeon-crawling map, it's just so amazing! I can't even dock points for the unfinished animations-- Shanghai turning into a stick figure is honestly quite cute. Some of the 3d feels slightly blocky, but that may have been intentional, and besides... this is a game maker game! how did you do that!?
In short, 'twas absolutely INSANE how did you do all this mostly BY YOURSELF in a MONTH‽‽‽