Seeker looks like a very simple platformer but is a lot more than that. After looking at the comments, I was very happy to see that most people found around half of the endings meaning the beginning learning curve is probably about right. The whole challenge with making this was definitely balance and I spent far longer on these first 6 doors to ensure they kept leading you to the next. You can do them in any order as well so the "First 6" can be different for different players. While I view this as a success and giving text instruction goes against the point of the game, for the sake of the game jam players and respecting that nobody has an hour to jump around a single level looking for clues, I have provided a full list of spoilers in the approximate order that I expected they would be found. If you are completely stuck, just click down the list until you learn something new! Hopefully this allows people who want to enjoy the full game without spending too much time!
(also added to entry)
Play here: https://ldjam.com/events/ludum-dare/47/seeker


Hints/Solutions:
1
!> Jump on the blueish grass to the right to push it down and open the first door.
2
!> Jump on the blueish grass block to the left at the start of the hill to open up the gravel pit in the middle. Then jump on the gravel to make it fall and get to the door below.
3
!> Jump on the gravel to the left of the spawn to find a hidden room. Click and hold while underneath vines to whistle and grow the vines which you can climb to the door!
4
!> Whistle underneath the vine hanging from the tree to climb it.
5
!> To the right of the tree there is a field of flowers and a door. The door closes when you step on any blue flowers so avoid squishing blue flowers to get past this door.
6
!> If you jump up above the tree (to the left) there are six "buttons" in a row. The correct code must be entered and is different each time. To determine the code, listen to the pitch of the bird's tweets (or watch the position of the notes).
7
!> On the left side jump against the wall. There is a hidden door that remains open as long as you have not stepped on any red flowers!
8
!> Behind the red flower door there is a gravel pit maze. The solution is to first go right. Then go right again but push against the right wall and you will find a secret passage leading to the door.
9
!> In the gravel pit, destroy only the blocks on the left. This side has a secret entrance to a new area.
10
!> To move the turtle, move your mouse.
11
!> Past the turtle door, destroy the gravel to find another entrance.
12
!> To the left of the turtle area, jump against the wall. There is a secret area here.
13
!> In the secret area mentioned above, whistle for a while and vines will come down from another secret area above the room.
14
!> There is a secret area on top of the mountain on the left. Climb this mountain (using the vines) and go to the very top where there is a secret entrance leading to the door.
15
!> On the right side above the first door, there is a hidden area. To open the first door, avoid squishing yellow flowers. To open the second door, you must squish all blue flowers! There are blue flowers on the far left side of the map as well as the ones on the right.
16
!> Behind the Yellow/Blue flower puzzle door there is a secret entrance to another door. You have to jump over the first door and fall into the hidden pit behind it. (this is probably the hardest to find)