you know an idea that would be a bit different for a game like this would be to have the cards fall down to your hand of like four cards each bound to a key (wasd) that lets you select from the different hand slots and then if you dont use a card before the next one is dropped you lose a heart, that way its getting keybinds in instead of clicking and picking up pieces and you get to keep the feel of the challenge being in trying to beat the falling speed of the cards? Spitballing because I've actually been playing this since I commented and was thinking on good solutions for a while cause a tetris keep one use one style would completely take the challenge away unless you were to rework the heart and card speed system into something else altogether