Yes, please share your game! As far as I'm aware it's absolutely OK to share your own works here!
Decker can lag a bit with larger file sizes, but there may be some ways to bring it down. A recent Decker update added better image compression, that can help if you've got a lot of images. I did peek into your profile and found your game, and I noticed it's made with an older version, so updating could help. Another thing that can help is keeping in mind that each card will have a separate copy of an image, even if they're mostly the same. So if you've got two cards with the same or similar images and just different scripts, maybe they can be combined. But it may be tricky to do that with a project that's already pretty large.