The first puzzle is simple.
There are two blocks, and a missing block.
Jump on the first twice.
Jump to the second block.
Jump back to the first, then jump to the second, third, and over the green pillar.
This is the only puzzle you have to actually solve in the game. If you wait for 15 minutes before solving it, you will earn this:
Every other puzzle can be skipped without penalty by pressing
, then Skip Puzzle. You can fast forward through dialogue the same way.
I don't recommend doing these, since you will miss an interesting story and all the puzzles, but you CAN. You can also just skip puzzles you are having difficulty with.
The only two achievements that are missable are these:
I suggest you read the guides for those.