Well, this is kinda small stuff but, in third line there is "kodomo no koro ni mita yume GA" but when you listen to the song, it clearly says "WA" (ha,は), also, in the title, the particle "へ" (he) is written as it reads (e) but in several parts of the text, "を" (wo) is not written as it reads (o). I think it should be all written in a single way.