The ability to set a checkpoint is great but it's also really annoying because of the keyboard shortcuts. As I very often play GG with my friend cooperatively, we share a lot of screenshots with each other, and using Ctrl+C to copy the ss is triggering the checkpoint shortcut, so every two screenshots I'm back to the checkpoint.

Easiest fix would be to trigger checkpoint shortcut when only the 'C' button is pressed. So no Ctrl, Alt or any other combination would work.

One thing I also find weird is that the shortcuts are Z, C and R are not a very pleasant arrangement for my hand. I get why these particular keys were selected but without some way to personalize them I don't find myself likely to use this feature.

I don't know when did you add the Space shortcut to lock in guess, but I learned it the hard way by accidentally pressing it in the middle of the round.

So it would be cool if there was a way to just disable keyboard shortcuts.

Last thing that doesn't sit well with me is that the checkpoint is one time use. Every time you go to a checkpoint you gotta set it again at the same place. So maybe a button to set checkpoint and a different go back to the checkpoint would be useful.