Climbing hills are your best advantage. Since most of the animals below you cannot climb hills, you can use the climbing ability to catch prey and level up quickly. Beware though, when you pick a hill to climb on you need to factor in the enlargement you face when you climb a hill due to the zoom feature.
If you want to level up by eating, then banana trees and coconut trees are what you should look for. If you are lucky enough, you can get a full tree, giving yu lots of XP to either level up quickly or gain a huge amount of XP.
When catching smaller animals, make sure that you use your claw ability when close enough so you can stun them. Although the claw slash knocks animals back, they are stunned for enough time so that you can get a bite out of them.
When escaping, ei death. If you are stuck in a tree/hill when a predator is trying to eat you, quickly slash them and run away. This will knock them back and stun them so you have a greater chance to escape. However, this doesn't go the same with Elephants, as they can knock you out of trees with their ability and eat you. If an elephant comes, quickly run away and hide, and hopefully, it will not see you. If you are in a hiding hole, you may not want to risk tailbiting elephants, as they can turn around quickly and use their trunk ability. o
If you are being chased by a Tiger, turn around and slash them and run away or else, you will be killed. Because Tigers are faster than you in everything.