Enjoyment: Very nice flow-state you enter while playing - I was really engaged to solve the missing piece, but sadly failed to move to the next stage.
Gameplay: Overall very nice implementation and feel. The slope is a bit contra-productive, on the one hand jumping is blocked while on the diagonal parts and when shifting from the human realm into the goblin realm you get soft-stuck there.
Innovation: I really like this kind of games, where the map is altered, be it through map manipulation or parallel dimension shifts, this has great potential.
Theme: I really like the theme application, because it uses the theme from the looks & feels being in this strange goblin realm, but also applies it to the core mechanic shifting between realms that can put you in strange places of the other realm.
Visuals: Really nice pixel-art - the main menu has a bit of scaling issue but that aside great.
Audio: Nice soundtrack overall, no mute button was needed.