。
There's plenty of time to play.
Literal
Play time [topic-は] plenty exist-[polite-ます].
結構 ('quite, fairly, considerably, enough, plenty') is a high-frequency adverb with multiple senses — here it means 'plenty, quite a lot.' The preceding 遊ぶ ('to play') in dictionary form modifies 時間 directly — an attributive verb form used as a relative clause. Very natural casual-to-polite speech.