Cool idea! The idea of a wizard free falling reminds me of Downwell. I think it is a cool mechanic. It would be good for the players to start very easy with only one button/letter to take care of and lower speed and progressively increase the difficulty.  That would have helped the player to get into the game more easily.

Cool concept, I have fun! Good job :)!

Really hard, very little time to react and the letters are barely visible. Could also be fun if the fall started slow but sped up over time!

Cool and original concept, but man is it hard to see those letters! That's the number one thing I think would improve the experience is letter visibility