Every single puzzle is solve-able by logic. If stuck, pin a column and check it against the others. It will change the highlighted colour if the column is identical, giving you another clue was to how to solve it. Can be done by checking without the pining, but the built-in tool is helpful.
I find this much more addictive, fun and less repetitive than the restaurant games. So sad to reach the "ending" so fast, but going for unlocking all the epic plans at least.
Awesome game. Nearly tore my hair out looking for one of the arrow dials, broke down and consulted a walkthrough, headdesked, then joyously finished solving it all on my own. Huzzah! Found 2 secret items, I assume there are more. 5/5 Going to consult your backlog of games now!
I think it would be much improved if you could click on the topping and have it stick to your mouse until you click where you want it on the pizza. It's not making things less challenging, like iSpazz2's suggestion of clicking and it appears on the pizza, but click and drag as it is is rather awkward. Otherwise, love the game.