First of all, thanks for the efforts you put into this Necronomfive.
I used to speedrun Gimmick for a short period and I am owning the original Famicom cart which I am playing on my AV Famicom. I played through the game on my Famicom Everdrive with the latest mapper update to check if there are any differences compared to original cart.
Sound:
The soundtrack is way, way, way better than before and finally enjoyable but it still does not sound as powerful and voluminous as on original cart. Sound effects (jumping sound, starshot sound etc) are also finally there and since the last update they sound like they are supposed to sound.
Gameplay:
Gameplay wise I haven't noticed any differences or anomalies. I got the same sprite flickering as on my original cart so everything's correct here

I am very satisfied with this mapper update though I still have one thing that bothered me a little bit but I don't know if this has to do with the mapper or with the Everdrive itself. The sound volume is way lower than on original cart.
I hope I could help a bit
