Thank you playing the game! I had updated the WebGL build with some big fixes, but the windows build wasn't updated, so there would be some differences in the movement mechanic. Regarding the bat hitbox; you're right it needs to be fixed. Initially I had a limit on the grappling hook distance, but I've eliminated that in the WebGL build so that any platform you see on the screen would be reachable. The web build runs smoothly only on Chrome browser unfortunately, but I'll update the windows build to the new version. Thanks for the detailed feedback