I must admit, I know how to play tetris like everyone else, so I just skipped all instructions and went straight into the game. Then was surprised why I lost when I completed a line. But of course you wouldn't just remake a tetris without putting some twist on it. So I read the rules and played again, and it's pretty refreshing to play with tetris blocks but with new rules.
I would say that the font choice matches the theme of the game, but is quite hard to read. the block letters is better left for titles, while the longer instructions should just be a normal text font.