u/Apprehensive_Mark481

(the aim structure)

Step 1

Build a lifted frame(1log height) as shown below(p1.1). The red rectangle is the place you want to put the final archway at.

p1.1

Aim at the up arrow here(p1.2) then place a 1/4 log once. After that, place 3/4 log three times aiming the same arrow. The correct placement is what p1.3 like.

p1.2

p1.3

p1.4

Now, we can remove unnecessary logs built in p1.1 which turns to p1.4 state. From p1.4 we move on to the next step.

step 2

Place a log at the top of 3/4 log and lift it up(p2.1, the direction is shown below).

p2.1

Aim at the up arrow(p2.2) and place 1/2 log twice.

p2.2

p2.3

Remove unnecessary logs untill same as p2.3

P.S. I strongly suggest not to skip p2.3 because it has been tested to be more likely to fail in step 3 using the same log in p2.1.

Step 3

Place a new log like p3.1 showed. Hold an axe, aim at the red dotted line(p3.1) and chop once. If that end of the top log sinks for 1/4 log height after one time's chop(as shown in p3.2), that means you succeed.

If not, you will have to restore to p1.4 state(remove the top and the left logs) and try again to make it to p3.2 state.

p3.1

p3.2

Build such frame next to the 1/2 log(p3.3), then lift up at the arrow position.

p3.3

Aim at the up arrow and place 1/4 log twice. After doing this, you can remove the p3.3 frame.

p3.4

p3.5

Now you should be able to see this white diagonal down arrow(p3.5) while holding a log.

Place a log follow the arrow. You can get an "X" shape structure shown in p4.1

Step 4

Stand by the 3/4 log, hold an axe and chop at the red dotted line here(p4.1). If you do correctly in former steps, you will need to chop three times. You will get p4.2 state after chopping.

p4.1

p4.2

Step 5

Place log twice follow the white arrow in p5.1(the arrow won't vanish after you place the log once, so you can place it a second time). Then you can get p5.2 state.

p5.1

p5.2

Make sure you have two top logs stack here in p5.2.

Better save the game here at p5.2 state！！！Or you will have to restore to the start if you face p5.4 problem.

p5.3

Hold 1/2 log in hand and jump on the top of it (seems to be more likely to place it correct), then follow the lift up arrow and place both sides. <--This is the last step

p5.4(one of the diagonal log wrongly supported to the top)

p5.5

Hopefully you will get the final structure like p5.5.