Super awesome pre-alpha, very smooth performance, one thing I noticed definitely needs work (duh, its a pre alpha) is the movement. I think when the player is in the air they should maintain all of their momentum even when not pressing any keys, at the moment you come to a dead stop if you stop pressing any keys. Movement in general should be more smoothed out, with acceleration and deceleration when running. My last gripe is that you're using the same sprint system as Minecraft. Please switch it so that the player runs by default, and holding down shift or whatever key slows you down to a walk. 90% of the time the player is going to be running, not walking, so it's a bit of a pain to hold down the sprint key all the time. I am fully aware that this is a pre alpha and literally everything is going to change, just my suggestions.