SOLUTION par Jacob GUNNESS. Testé par Fredbezies et Kukulcan le 03/11/2021.

Notes:
1. On Jara-Tava, you have a limited number of moves before the volcano erupts. However, this number is rather large, so you should have plenty of time.
2. The crocodile seems to be harmless
3. The strange fruit is useless.

001 - N
002 - GET PARACHUTE
003 - N
004 - E
005 - E
006 - SWIM (to the ship)
007 - D
008 - GET ROPE
009 - U
010 - SWIM
011 - W
012 - W
013 - W
014 - S
015 - READ MESSAGE (a hint on where to find the treasure)
016 - N
017 - ENTER HUT
018 - GET NOTE
019 - READ NOTE (how to build a glider)
020 - DROP NOTE
021 - W
022 - N
023 - N (this is a good spot for building the glider)
024 - DROP PARACHUTE
025 - S
026 - W
027 - TIE ROPE (to a tree)
028 - D
029 - ENTER CAVE
030 - GET CUTLASS
031 - W
032 - U
033 - DROP MAP
034 - GET ROPE
035 - E
036 - N
037 - CUT BAMBOO (with the cutlass)
038 - DROP CUTLASS
039 - GET BAMBOO
040 - N
041 - BUILD GLIDER
042 - GET GLIDER
043 - FLY (you fly to Jara-Tava)
044 - D
045 - READ SIGN
046 - DROP GLIDER
047 - W
048 - N
049 - N
050 - U
051 - N
052 - ENTER PLANE
053 - GET RAT
054 - S
055 - S
056 - D
057 - S
058 - E
059 - E
060 - PUSH TREE (it forms a bridge)
061 - N
062 - THROW RAT (the snake slithers off)
063 - U
064 - GET SHOVEL
065 - D
066 - S
067 - W
068 - W (here are the orchids mentioned in the message)
069 - DIG (you have found the treasure!!)