Good game but I have a few suggestions, make a key bind for R to be respawn, because you have to wait a lot to fall and start over, also make the FOV change a little so the player knows that he is actually running faster than walking. But for a demo this is good, the timer is a nice addition, could be used for beating past records, something like a list of how fast you finished the level and you have to beat it as fast as possible.