Gravity Game Progress

I have been working steadily on the gravity game for my GSP240 class, and I have boiled it down to 2 ideas which I have made into working prototypes: A game in which you can turn the room left or right 90 degrees at a time and have to navigate and avoid obstacles to reach a goal, and a game in which you control a circle which moves around the outside of larger circles, and can jump from one to another. Both of these prototypes work well, and I am at the point where I need to make a decision and add graphics and whatnot before continuing. I am going to wait for tomorrow to see what my classmates came up with, and based on that make my decision; if someone else did something similar to one, I will do the other. I don't want to appear as though I'm copying anyone else after all.