Ends with a 体言止め (noun-ending) — 順調 ('smooth, going well') is a na-adjective/noun used without a copula for a terse conclusion. 至って ('extremely') is a formal/literary intensifier. 滞りなく ('without a hitch, smoothly') is a fixed adverbial formed from 滞り ('delay, hindrance') + なく ('without'). 進み uses the 連用形 (ren'yōkei stem-form) as a clause linker — characteristic of written register. バタ足 'flutter kick' (swimming).