i love the sound effects for the typing so satisfying, you could maybe built in a hint system for the first game? maybe? the second game I didn't really understand
also I did understand after a while that the right puzzles get slightly transparent but you could explain that transparent mechanic the first time it happens (a small text box just saying that...and then disappearing again) and maybe you could built in a hint button with how the image is supposed to look like. At first it was really hard until I saw the screenshot below.
the hint image could disappear/ be minimized if u didnt intend to obscure your nice art :) but maybe you could've even added a toggle if u as a user want the image to disappear or not while playing (because it really makes the playing much more enjoyable if you at least the goal) otherwise kind of hard