A Heart-wrenchingly beautiful story itself couldnt be any better. Plus, graphics and music are more than satisfactory.
To my regret, there are many errors left in the english text. For example, in Chapter 12, the follwing sentence should end with " the speed of sonic" rather than just "the speed."
"He possessed the ability to fire various shells with insulated coating over long distances faster than the speed."
A ceratin customer about planetarian 〜ちいさなほしのゆめ〜, v1.0.2