Have you ever played a game, where the character you are playing evolves? Needless to add anything more about this game, you should play this and see everything for yourself. Kill creatures, collect badges and transform into another creature.
Evolution Heroes is the game about survival and, as far as you can guess, about evolution itself. Start at the tiny spot and read hints around, proceed further and deal with challenges ahead. Guess what? You will have the opportunity to evolve if you struggle enough. That will open various paths, that were locked to you a moment ago. Have fun!