one change could have elevated this game from a buggy mess to a very fun puzzle platformer :
for me it seems like you made a rigidbody character controller but you didn't change the rigidbody to continues . (I could be wrong tho )
But as it is its not a very good game , I randomly fell through the floor , glitched into walls , jumped out of walls , or couldn't jump until I restarted the level , and the press of esc at the end does nothing
It was very entertaining tho ( not only because of the glitching ) , and it looks stunning , by far one of the most colorful games from the jam