I think tweening is way over rated for 2d games. Fixed rate logic that renders as often as possible or time based delta logic makes more sense for 2d games. Also, ask yourselves why you would ever want your game logic to update faster than the monitor's refresh rate. (Updating logic 200 or more times per second for instance.)
Like it or not, on slower under powered computers you're going to get a performance hit anyway you look at it. It makes more sense to recognize that in code and simply lock your frame to 15, 20 or 30fps on those machines.
Like it or not, on slower under powered computers you're going to get a performance hit anyway you look at it. It makes more sense to recognize that in code and simply lock your frame to 15, 20 or 30fps on those machines.