I like the multiform abilities. In particular, I liked using the pumpkin to roll down hills and pick up speed. It was great that the forms you acquire early on are still relevant in later levels. Switching forms felt a little clunky on mouse and keyboard, as I could only use 1234 above WASD and not the keys on the numpad. Thankfully, there weren't many sections where quick switching was required. A possible improvement may be to have the transform keys on HJKL for the right hand.
The music and spritework is excellent. It is a nice detail that the forms are found in areas that they relate to. The inclusion of the other gnomes and their comments throughout the levels adds more life to the game. I like the inclusion of the detective story element, and its resolution. Putting aside my opinion about the form switching shortcuts with mouse and keyboard, the controls felt pleasant to use and the characters felt very fast yet controllable.
A short and sweet platformer with a small side of mystery.