Sorry for the delayed reply and thanks for the older version. Oddly the haptics are still not working on Galaxy S7 Edge even with the older build of Octopus. Did you ever release a prerelease version that didn't have the haptics adjustment slider by any chance or was that always there? The haptics vibrator does work for other functions of the phone.
I cleared all my Chrome cookies/cache etc. Also tried the inbuilt Samsung browser and cleared all the user data, still no go.
App does work fine on wife's Galaxy S10 though, just don't tell her I've been testing out old LCD games on it. ;)
That's really strange :( Good to know it does work on your wife's S10 though... and don't worry, I won't tell her what you've been up to on her phone ;) I do think there was a early test version of the vibrate feature that didn't have the slider but I must not have checked it into source control so I can't rebuild it for you unfortunately. Btw, I did try to tweak the vibrate code a little for Mind Boggler but I assume vibrate is still not working on your phone since I see you did play that game and you would have noticed if it was working.