Gameplay ideas

http://liberapedia.wikia.com/wiki/File:Super-mario-bros1-1.jpg

http://en.wikipedia.org/wiki/File:MD_Sonic_the_Hedgehog.png

http://snakegames.info/wp-content/uploads/2012/11/snake.png

Here's a couple of rough doodles of possible gameplay.
1 - simple platform game inspired by several games including Mario, Sonic and several others.
2 - One screen styled play where the hedgehog would move right and left to catch falling items and avoid dangerous foods.
3 - Similar to 2 but food and items fly from the right to the left with the hedgehog moving up and down
4 - Overhead view similar to that of the Snake games with food and items randomly appearing on the screen (my personal favorite as of now)

 Some items in the game:
Foods
Good: Top row (Strawberry, Carrot, Banana, Chicken)
Bad: Bottom row (Rasins, Lemon, Chocolate, Fish)

The teddy would act as an extra life in the game