One thing thqt I recommand you change: don't put hard drop on the up arrow. Most players are used to rotate with up in tetris game.
Up to hard drop has been a staple of mainline Tetris games since the 2001, including the latest editions such as Tetris Effect.
https://tetris.fandom.com/wiki/Tetris_Guideline
If players have not played a Tetris game before, they will adjust. Additionally, up to hard drop is practically required for some very advanced moves which will eventually be explained in a tutorial.