Modified balance, fixed small issues

Modified some balance issues, changed land fish to restore more stamina, sea fish restore 20% of your stamina as opposed to just 20 stamina, enemies now level up stats more gradually, xp rates changed and xp needed reduced. Fixed issue with xp where only currently held fish counted towards xp, enemies weren't being registered, and xp would end up resetting as well,

can-you-survive/Enemy.cpp

@@ -2,8 +2,8 @@
 //Constructor
 Enemy::Enemy(Vector2f position)
 {
- health = 100;
- maxHealth = 100;
+ health = 75;
+ maxHealth = 75;
  level = 1;
  m_damage = 2;
  speed = 128;
@@ -362,7 +362,7 @@ void Enemy::MoveTowards(float elapsedTime, float totalTime, Vector2f pPosition)
 
 void Enemy::LevelUp() {
  level++;
- float multi = pow(1.08, level);
+ float multi = 1.05;
  health = maxHealth * multi;
  maxHealth = maxHealth * multi;
  m_damage = m_damage * multi;

can-you-survive/Input.cpp

@@ -179,7 +179,7 @@ void Engine::input()
  }
  else
  {
- pPlayer->addXP(90 * year);
+ pPlayer->addXP(50 + (10 * year));
  }
  }
  }

can-you-survive/Player.cpp

@@ -260,14 +260,17 @@ void Player::StaminaDecrease(float reduce)
 {
  //Reduce stamina a certain amount
  stamina = stamina - reduce;
+ if (stamina < 0) {
+ stamina = 0;
+ }
 }
 
 //Restore health and stamina when player hibernates, fish consumed and used 
 void Player::Hibernate() 
 {
  stamina = maxStamina;
  health = maxHealth;
- xp = fishNum * 10;
+ xp = xp + (fishNum * 10);
  fishNum = 0;
 }
 //Check if the player has gained enough xp to level up.
@@ -279,8 +282,9 @@ void Player::CheckIfLevelUp()
  maxStamina = maxStamina * 1.05;
  health = maxHealth;
  stamina = maxStamina;
- m_damage++;
- xpNeed = xpNeed * 2;
+ m_damage = m_damage ;
+ xp = xp - xpNeed;
+ xpNeed = xpNeed * 1.3;
  //Check level up again incase another level up condition is already met
  CheckIfLevelUp();
  }
@@ -339,13 +343,13 @@ void Player::Pickup(std::string name)
  if (name == "land")
  {
  //Stamina restoration is based on maximum stamina, the higher the max, the more stamina restored
- stamina = stamina + maxStamina / 10;
+ stamina = stamina + maxStamina / 5;
  //If stamina restoration increases it to more than the max, set stamina to max
  if (stamina >= maxStamina)
  {
  stamina = maxStamina;
  }
- xp = xp + 10;
+
  }
  //Sea fish are stored for later use
  else if (name == "sea")