Thanks, I do feel like the VFX are too high quality for retro though, but they're from a free asset pack and I didn't have time to make my own.
Not sure about 100% GPU usage hmm. I do feel like most UE4 games I play, indie as in jam or professional, or even professional AA and AAA games, GPU usage does seem high generally. Though I've not really looked into optimisation aside from whether or not it runs fine when I playtest it, nor am I familiar with that technical side much :/