You must create a row of 3 with your symbols (O or X). Click to set your symbol. Switch between 2 player and single player mode with the button on the bottom left. Adjust bot difficulty with the lever on the right side. restart the game with the accordingly named button or the green flag.
On the highest difficulty, the bot should not be defeatable. If you do so nevertheless, please tell me in the comments how. Changelog: >Weak spot found, will be fixed out soon... >Reworked bot -> Weak spot fixed now. >oops, bot got unbeatable even on level 2... >re-balanced difficulty -> Bot can now be defeated on level 2 again >_