Not bad for a demo! Art style is good, controls are smooth, and the map is interesting enough without being overly complex (one of the worst things a Metroidvania can be, as I'm sure you'd agree!). The animations could definitely use some work, and the difficulty was very low, but these certainly aren't inexcusable flaws.
Also, I'm weirdly attracted to both the player character and that Baphomet-esque final boss, so... do with that what you will.