Also, most of the puzzles have some form of symmetry; if you can find a centerline, you can usually put the middle value in the center. This is actually much easier than most of the logic-picture puzzles I've played. The mouse + shift key make marking the squares go FAST.
You can usually eliminate more by trying (in your mind) to see what would happen if you put a long block against a starting square on one edge: what squares would it force in the perpendicular direction? If it isn't possible, then you just eliminated that starting square. And don't forget - you do get 5 guesses, which instantly reveal if you are wrong or right: use those in the most strategic spots you can find.
Start out doing the ones with the largest sums (you can also add 1 square for the mandatory space between numbers). Look for sums that add up to over 1/2 of the grid width/height. Example: 6 in a 10-wide square means that the middle 2 squares MUST be filled. It's all logic from there on out. It *is* possible to guess at apparently symmetrical designs, but it shouldn't be necessary.
Not sure what you mean about guessing; so far I've been able to deduce them. (You can use the "X" button to mark a square as impossbile; don't just rely on memory)
oh, and 1/5 for also allowing your characters to fall from the top of screen to the bottom without dying. (Oh gee, I hope I didn't give away too many hints on how to solve some of the puzzles with THAT comment.) This game just sticks in my head like the lyrics to some stupid song... it's that annoyingly bad/easy.
I feel dumber for bothering to complete Hard after doing Normal. I couldn't tell the difference between the two at all. Both are ridiculously simple, and I hope to God that this thing doesn't get badges. Candystand is a good publisher for this, because this was easier than taking candy from a baby. A quadrapelegic, paralyzed baby. Encased in a full body cast even... 1/5 for being far too easy.
I prefer cargo bridge and it's glitchy physics engine to this one; this one makes me feel like I'm in Grade school. Levels aren't organized in increasing difficulty. There are maybe 3 levels that took me more than one try to finish.