Great game, performance decaying – Chop Chop Runner Review

I've been playing Chop Chop for years and had a lot of fun with it. However, overtime, the game's performance has seemed to slow down, and it lags a lot more now. I started on an iPhone 3GS, and moved up to a 4S. I don't think they ever updated its configuration to work with the new 4S systems. Anybody else have a problem with lagging?
Review by ReviewName04 on Chop Chop Runner.