Every stage has it's own mechanics, part of the fun is trying to figure out how exactly it works. The goal is to find the star(s). Please to enjoy. Just be patient, it's a small japanese site, so the loads can be rather slow.
Hoshi Saga 3
Also found Hoshi Saga 1, and Hoshi Saga 2.
Hoshi Saga 3
Also found Hoshi Saga 1, and Hoshi Saga 2.