Thanks for the feedback! This is a beta release so in future updates ill try to add some sound effects and as you said different food types. The difficulty does increase. Below score of 50 every half a second hunger decreases by 1. Below 70 by 2, below 100 by 4, 120 by 5, 150 by 7, 180 by 9 and below 200 hunger decreases by 10 units.