Thanks for playing, I'm glad you liked it! The gun disappearing is actually because B also holsters the gun, and there's a bug where it still happens when exiting menus. Multiple people have been thrown for a loop by that, so I'll need to fix it, and probably have a prompt to pull it back out. I'll also take a look at the other bugs, there's some refinement I need for ladders and movement in general.
It's neat you noticed the skipping! Yep, it's 10-20% faster to jump.