Hi again, thanks for tips.
In relation to Xbox:
Changing the Xbox button assignment does allow me to change the jump key to "Y" button or shoulder buttons althouth I think it marks the key as unknown but still works. Cannot assign to A or X buttons, can also assign to B button but this causes a conflict as its also used to back out of a webpage.
Changing to SD mode on Octopus does allow the game to run in fullscreen mode (in 1080p at least, unsure if this would also work in 4K screens). If I switch it to HD mode it will flash between the game at full screen and a black screen for a few seconds and then crashes webgl (sad face icon in top left corner of game) and then requires a restart of Edge to get webgl up and running again.
I also tried snoopy tabletop and that works in SD fullscreen but not HD.
Donkey Kong Jr. does not work in any resolution setting even in non full screen mode and just keeps reloading back to the opening title page (I think it crashes webgl eventually but would need to check again). I am wondering if this is perhaps something to do with the mirroring effect method used?
I don't suppose you have any future intention to add "Dragon" by Tiger (also branded Orlitronic in some countries, 1982)? That's one of the more obscure games I had in the 80's and there doesn't seem to be much info on it online, took me a while to even figure out what the game was when I was searching recently as I could only remember the gameplay description and not the name or manufacturer, I did recall that the casing was orange though so that helped a bit and I recognised it when I saw an image online. http://handheldempire.com/game.jsp?game=2560
Thanks for the feedback. I don't know much about the Dragon LCD game and unfortunately it's difficult to build a simulation for a game I can't play myself or collaborate with someone who owns it. I will be setting up a companion website (when I have some free time) with a community discussion board where I hope you'll post about this game again. Maybe someone who owns it would be able to provide more information and resources :)
Awesome thankyou. It works well on Xbox One Controller on my PC. By default the D-Pad is not active and it uses the left joystick instead. Easy to remap to D-Pad in game but you can only have one or the other, not both it seems.
The start and select buttons are also not mapped to any controller buttons by default, but again easy to map to controller buttons 8 and 9 as shown in your screenshot.
I'll also try it out on my Xbox One using Edge browser and get back to you with results.