Great game, I liked the idea and the execution.
The end credits and the level selection menu are lovely.
Just two nitpicks: jumping in tight spaces is a bit hard, as as soon as you touch a wall Buggi sort of sticks to it, maybe the hitbox should be a little smaller, at least when in midair; in the end there's the question about getting all the stars, it would be nice to add a counter in the levels to keep track of them.