Difficulty changes

After receiving feedback on The 20 Game Challenge's Discord, I made some modifications to the game's difficulty.

The new difficulty thresholds and their corresponding effects are as follows:

1. Score > 20:
   • Difficulty set to 2 (higher amplitude regarding where the hole can appear)
   • FlappyThingy is burdened by its life choices, making it more challenging for it to fly
   
   
2. Score > 30:
   • FlappyThingy faces increased difficulty in flying due to fatigue
   
   
3. Score > 40:
   • FlappyThingy's flying ability is further hindered by its past actions
   • Giant thingies might appear, introducing an additional challenge
   
   
4. Score > 80:
   • Difficulty set to 3 (higher amplitude regarding where the hole can appear)
   • The game is intentionally designed to be more challenging, providing a demanding experience for player. Joking, it's not fair anymore