Word Games: the challenge

Word Games A collection of word games don't expect easy ones.
-Tetris-style word game: letters fall one at a time onto a board, and you must fit them together to spell valid words horizontally or vertically. Every time you complete a word, the letters vanish, the board resettles with gravity, and you can trigger chain-reaction combos for bonus points. The longer the word, the more points you score. Play at your own pace, swap a letter whenever you need a different piece, and try to survive as long as possible by stacking letters and spelling words before the board overflows.
Brain-teaser: you're given 16 shuffled letters and must use every single one to form 3 secret words — two 5-letter words and one 6-letter word. There's no timer and no lives, so test as many combinations as you like before locking in each word. Stuck? Use one free hint per word (first letter, last letters, or middle letters).
A memory test against the clock: 16 letter cards flash face-up for 6 seconds, then flip face-down. You need to remember where each letter was and tap the cards in the right order to spell 3 secret words, without ever seeing the letters again. You only get 3 attempts.