She [topic-は] my right-foot [object-を] with-all-might kicked-at.
思い切り ('with all one's might') is a useful adverb derived from 思い切る ('to resolve/steel oneself'). 蹴りつける is a compound verb — 蹴る (kick) + つける (apply force to) — intensifying the kick with the sense of striking a target.