patch v0.1.6

Thank you for playing! I have made two changes. - Changes the number of life for training levels from 1 to 3. (It was too difficult for beginners!) - Fix a bug - Can't restart a level if the player pressed 'RESTART' button on the UI that is shown when cleared. [h2]Advice[/h2] The difficulty level depends largely on the mouse sensitivity! Press the ESC key to open the pause screen and adjust the mouse sensitivity to be sensitive.