(game 2 of me going through this list by selecting games at random)

Really cumbersome. Not very good as a word game--it's laid in levels which implies that there's one "dev-intended" solution for each level, which definitely isn't the case. You're definitely going to have to use the two replacement letters and the 3 abilities, and the ability that kind of makes it all fall apart for me is the "randomize all remaining letters" ability. It does what it sounds like, but it introduces a randomness system into a puzzle game with "prebuilt" levels, a randomness system that just makes you lose sometimes. It's just... why? Combined with how restrictive most of the levels generally are (you will need to use that RNG button basically every time), it ends up kind of falling on its face, as far as a word puzzler goes.