is dokidoki literature club, (a visual novel) good? It sounds gimmicky.
No, it's pretty bad. Meme game.
Princess Sera is better
I'd say it's worth a blind playthrough, but if you've already been reading about the game(given the link), then I say you play through it if only to satisfy your curiosity.
It tries to pull the same gimmicks as another visual novel whose name escapes me. I think this has gained a lot of exposure though since it's free and is natively available in English as opposed to the other VN I'm thinking of.