I consider myself pretty versed in this game. (11 killscreens & 1 million point player) so I figure I'm speaking from a pretty experienced level when talking about the sound and gameplay. I personally haven't found any input issues at all. I've not played the MiSTer core as much as real PCBs.
The person who reported that bug (Matt Tecchio - 1.2m player & 5th in the world) knows the game inside and out so I have no doubt at the time he was experieincing issues if he took the time to report it. It's an advanced technique that only a very few players use, as the timing has to be pixel perfect.
https://github.com/MiSTer-devel/Arcade- ... /issues/19
https://www.twitch.tv/videos/418564989 <-- Gardikis jumps by the WR holder
Matt's issue could have been down to a lag on the controller or configuration issue, very hard to pin down this stuff when it's all about very precise timing and control.
On a side note, newer players often mistake incorrect timing for input issues (ie: leaching kong;s leg on the blue rivet stage), where it's actually the land not finishing out before hitting the jump button again.
A non-sound remaining issue I believe is that the game is playing in 'cocktail' mode by default and Player 1 screen is actually drawing in reverse as noted by Jace Hall (owner of Twin Galaxies).
MiSTer FPGA
![uSjMd45.jpeg](./download/file.php?id=10359&sid=714e9f8e6c8905944a6dae44dc044f03)
- uSjMd45.jpeg (111.58 KiB) Viewed 1485 times
Orignal PCB
![fYPrzRz.jpeg](./download/file.php?id=10360&sid=714e9f8e6c8905944a6dae44dc044f03)
- fYPrzRz.jpeg (111.69 KiB) Viewed 1485 times