The game has two different endings depending on your selections. There are some other selections which can alter the game as well. Most other options simply lead to a game over.

Day 1:

If you say "Why Not", you will get ending 2. If you say no, you will get ending 1 later in the game

Day 2:

The beach segment is randomized. About halfway through the beach, you will find a gold necklace. If you run and take it, you will be able to skip the beach section. You will need 2500 chaffs to win, below 20 turns. 

If you selected "Why not" on day 1, you will get an encounter with the black market man. "Punch" in order to progress.

Day 3:

North, West, East, North, East, South, West, East, South, North

If you selected "Why not" on day 1, you will get another encounter with the black market man. Select "Shoot Them" to progress.

Day 4:

If you selected "Why not" on day 1, you will meet the black market man again and progress through some dialogue.

If you didn't, you will do another scavenge mini game at the grave yard. If you returned the gold necklace on day 2, you will skip the segment half way through the mini game. It is randomized just like on day 2. You will need 12 items below 25 turns.

Day 5:

If you selected "Why not" on day 1, you will do an escape scene. You have to make the correct choices within a time limit, usually about 1 second or one and a half seconds.

Fire, Dodge right, Dodge left, fire, fire, dodge left, fire, dodge right, dodge left, dodge left

If you didn't, you will do another selection mini game. 

Purple, white, yellow, red, green, purple, orange, white, white, purple, orange, yellow, yellow, yellow blue