first the slippery character this is true but the idea is that you use your ability as a player to use this physics correctly second that jumping is very easy I don't understand the complaint and third the tutorial says more than 3 that is 4,5,6
The thing is that size starts at 1, not at 0 yk ;), so when u get 3 coins, u reach size 4, and if u get 4 coins, you reach size 5 and die. Hope u understand <3