On evidence, aside from a couple of Indian-type, restaurants there are no decent restaurants in Worthing town centre.
Horrible food and/or slow/bad service and/or poor ambience and/or poor value for money (or a combination of all of those, are to be had, in no particular order, at:
The Fish Factory, Brighton Road, - cold, bland, overrated, unimaginatively-cooked food. Enthusiastic, friendly but baffled staff who don't quite understand this. Acoustically-poor: very noisy with tiled floors.
Cafe Monsoon, Bath Place, (tasty - but very over-priced (£12.95 chicken biriyani - that's mainly rice, with a few bits of chicken thrown in, to you and me) and nerve-shredding, Whitney-wailing-Houston on a permanent hi-volume loop. Ironically, they are now running "comedy" nights... ha-hollow laughter-ha!
Silverthorne's Fish and Chip restaurant Montague Street (truly revolting emulsified slurry with rancid fish oils for flavouring posing as "cods roe", stewed tea, overcooked chips ("we serve what our customers like") + surly service. There's a surprise.
Sofa bar & Restaurant, Marine Parade - obviously run by a sadistic meglomaniac - abominably slow service on a quiet evening / bland, food / pounding incessant disco noise / painfully over-priced (and that decor is soooo two years ago). The visual trick of presenting customers with a "unique square pizza" does nothing to make up for any of this.
ASK, Warwick Street - it's Pizza Express sister chain - what do you expect? Great decor, overpriced, not bad food
Pizza Express - ditto (tooth-numbing pre-prepared salads out of a cold counter)
Red, Montague Place - (only looked through the window): Great concept, locally sourced ingredients etc but just look at the prices! Startling and stark decor (Bet being placed now - how long will it last?)
The Church, High Street - don't go, become an atheist: Chris Chapman's personal eulogy to a belief in the life-enhancing qualities of cholesterol and Brakes Brothers' deliveries
Eden, Chapel Road - ditto.
(Highdown Towers, Littlehampton Road / Grand Victoria, Station Approach, ditto / ditto)
The Italian restaurant/ cafe in Warwick Mews - fabulously tasty, good portions of homecooked pasta + glass of house wine + garlic bread, £5.95: that's more like it. Also takeways homecooked by the same Italian Momma at Clifton Road Italian pizza/ takeway place.
Hogarth's Cafe, Warwick Street - if you can get in through the door at lunch time - vote with your feet.
South Farm Road Cafe - what you see is what you get: obliging staff, well cooked bog-standard favourites that won't burn a hole in your wallet.
Marks & Spencer's cafe - zero for ambience. Top marks for fabulous, Fair Trade, coffee.
(versus Cafe Zero, or is that Nero? Great ambience, zero marks for over-priced, non-Fair Trade coffee) Think: a worker on a non-Fair Trade coffee plantation daily earns less than the price of a cup of Cafe Zero coffee)
Casa Ciro, Marine Parade (Seafront) - pleasant, reasonable, set-price lunch menu.
The "coffee shop" in Montague Arcade opp TK Maxx - very handy, decent coffee - make a point of asking for Fair Trade coffee!
Wimpy - Chapel Road - for those nostalgic about how "British catering" used to be.
Guildbourne Grill, Guildbourne Centre - patronised by the living dead, served by cheerful staff - good for an honest experience when you're fed up with the poncey "Skinny Latte" pseudo-cafe-poseur culture that Worthing attempts to grow in its petri-dish of souless leisure activities.