カートスピードカーブ調整
Merge branch 'develop' into feature/cart_ui
Merge branch 'develop' into feature/cart_ui
加速度UI追加
Merge branch 'develop' into feature/cart_ui

Conflicts:
	Assets/Resources/Prefabs/Player.prefab
	Assets/Scenes/loader.unity
	Assets/Scripts/gameItems/Cart.cs
Merge branch 'feature/cart_ui' into develop