How can I delete my current account in game and restart the game from the beginning?

There isn't a way in game to delete a character but you can start a new one at any time. You may be able to contact the game support in game and ask them to delete a character if it's important.

To start a new character go to the settings menu and select the Account & Character option, then tap on Character Management and you can find the option to create a new character. This will let you start again from the beginning.

For more questions for Primitive Era check out the answers page where you can search or ask your own question.

You can go to your E-MAIL and add a new account and start a new game binding that game to your newly added E-MAIL address and merely abandon your old game!

But I'm pretty sure you can't unbind your present game.