Wordling is a Wordle-style deduction game: guess a five-letter word, and each letter turns a colour to tell you how close you are — green if it's in the right place, another colour if it's in the word but positioned wrong.
Five guesses rather than six makes it tighter than the original, so opening with a word that tests many common letters matters more here than in the game it's based on.
Five, which is one fewer than the original Wordle — so opening with a high-information word matters more.
One with several common vowels and consonants, like AROSE or SLATE. The first guess is worth more as information than as an attempt to be right.
Yes — tap the on-screen keyboard. Nothing to install.