This game was great until the last two where the solutions just seemed like they were made with the express purouse to make you frustrated.
Note: To properly explain this, I'll have to spil the solutions. If you haven't beten the game, turn away now.
The puzzle on Level 24 could have been really clever where you figure out that you need to spell orange with the keypad, ending with the solution being "672643" and it would have been really cool and intuitive. Instead, it turned out that I just needed to press each number until the letter came up, which wasn't hinted at in the least.
For that one, do what you did with the numbers and only have some letters be visible on the keypad, implying that the keypad requires you to press those numbers to make the letters appear.
And then Level 25 needed you to press and hold a button that, in every other level, is the quit game button.
Only thing is that the only hint you get (Outside of the hint buttion) is that the truck needs to go forward with three triangles that resemble the quit game buttion.
Issue with that is that the rest ofr the game is VERY minimalistic, so those triangles could just be decoration, and the player has no reason to see the two shapes as the same.
Maybe instead, it could be a truck that transports Orange Quilts, but with the L in "Quilt" being faded so that if the player is looking hard enough, they can figure it out.
Otbherwise, the puzzles were pretty challenging, and the only other times I needed to use the Hint button, I thought "I am an idiot for not figuring this out myself", which is good for a Puzzle game.
So, yeah.