Tough platform-puzzle, but I eventually made it! \o/
Great mechanic, with nice ideas at each level. The level-design itself is quite nice, with a lot of coins that seems impossible at first, but actually have a clever solution. My main issues were with the bumpers (they can be a bit capricious), and the portals (only for the harsh sound they are making).
Dialogs and story are also simple, but enjoyable. I like the overall tone.
Good job!