I'm not sure what difference it would make. It'd still pay 96%, still have the same reel maps and all you'd effectively do is manually nudge down a symbol or two that would have appeared anyway without the nudge. In other words, say you had 3 rows visible on reel 1 and diamonds on the next 4 reels, and nudged the diamond down on reel 1 to get a 25x 5OAK win, all you would be doing is emulating a spin whereby if the nudge hadn't occurred, would have given you 4 rows on reel 1 anyway and dropped the 5OAK diamonds in naturally. Some games just aren't appropriate for nudges. If you look at Holy Diver though, the expanding reels coming into play after the retrigger effectively do the same thing, by making more symbols available from above.
Nudges really are the domain of low-tech 3-reelers for a good reason. Unless you count gimmicks on games like Untamed Panda where the 3rd. scatter may nudge down, another completely pointless animation as the game was always going to give you the trigger on that particular spin anyway.
There have been in excess of 100 AWP type games made available, Bar-X numerous, Happy Fruits etc. JPM games, Astra, Mazooma and a few others have been created for online play, but really there isn't the market for them. People can play those in arcades as you say and they're boring in general, whereas the online platform gives players and developers the opportunity for more creative and complex slots. Astra for example were taken over Novomatic and that's why there are versions of their basic games online, but many casinos don't bother with them.
I think we need a special online amusement arcade site, one which is presented as follows:
'High Street Slots'
There will be a mobility scooter parked by the lobby. Cackling grannies will be sitting in a row along the Electrocoins. There will be a shadowy figure wandering about, only playing on benefits day each week. He will cadge cigarettes and go round the lobby checking slot trays for forgotten coins. There will be 'knock-off bonuses' where a local alchy or smackhead purveys his shoplifted goods. A 'reserved' notice can randomly appear on any machine where the addict who has lost their dosh will then run from the lobby to place their phone in Cash Converters before returning. There will be 'shark shadows' where one or two lads are purporting to play a machine, 1 spin every 2 minutes as they slyly look over their shoulders waiting to pounce on the 'happy' machine which has just swallowed the mobile phone and giro. Overlay all this with the shriek of Electrocoin nudges to complete the ambience.
I'll run it by MT Secure or White Hat Gaming.....