pretty good
this engine needs alot of work because you can't look up or down and the jumping delay from when you fall off a platform is terrible. However, the movements are fluid and I like the well done screeching delay when you start running and stop. That's classic. I know this is just a piece of what you most likely hope to accomplish with later versions so I won't give you a low score or a high score because this isn't really anything so a 6 should be a nice medium.
P.S. I like how when you start running he turns into the classic SEGA GameGear sonic I lol'd. Back in the day when the GameGear came out I was like, FUCK GAMEBOY! I still think gamegear looks better than many handhelds that came way after such as, gameboy color or gameboy advance to name a couple. People hated the Game Gear because it was so huge but I think they are just mad because their hands are small. Game Gear fucking rocks balls and don't let anyone say otherwise.
P.P.S. Lol sorry for using this review like a blog or forum. I just love to talk about video games. :)