Looks good and the idea is great, I do wish it was a little more flushed out but I did read the description and its understandable that more couldn't be done, especially since its only your second game. it looks amazingly stylized thought and I do love that.
my best bits of advice I could give would be to consolidate the controls between characters, even if there was a tutorial with how fast I had to switch characters the difference in controls was a bit hard to play.
other than that I think you could turn this into something likeTrine and it would work very well.