Crap - sorry I missed this. I can't see a DM feature for Itch.io, can you send it to domarius@gmail.com? I was just reading up on this, and it seems it might behave better in Godot 3.0, but I made this in Godot 2.1 https://github.com/godotengine/godot/issues/9561 If you have the time, it would be interesting to see if your high refresh rate monitor has trouble with other Godot games, like this one https://globalgamejam.org/2018/games/hyperspace-shoujo or this one https://levrault.itch.io/godot-2d-action-adventure-platformer-demo (that last one has some weird controls - left & right to move, space to jump, and F to attack...)