Cute game, I'm definitely interested. The character design is fun and tells you a lot about what type of game they come from in a subtle way, except for the ghost who is maybe a little blatant. Writing and sound are charming.
Few points of criticism. Will you actually get all the party members at the same time in the full release? I feel like getting 5 party members worth of skills in one go is a little overwhelming. It might just be a temporary demo addition, but giving the player some time to experiment before adding more characters would be good.
Also, is there a reason that the attack action command has to be pressing Space? I feel like it'd be a lot more intuitive to just have the same (directional) key that you used to attack would also be used for the action command.