Good game. I think that when its ported to a touchscreen device it will be a lot easier, since you can use several fingers and move faster generally than a mouse. Also, I think that the speed of tile change should go up more gradually and smoothly. right now its easy until you get to a certain point where its just going to be too fast. For instance, rather than have it go down by .1s every single time, it could go down .2s at the start and .5 and lower towards the end. This would allow people to play more levels and it would challenge them to the max before they couldnt take it. Just a few thoughts.
Awesome puzzle, It's fun to see these implemented in flash since I'm pretty sure this one is impossible to build IRL. It's pretty easy to solve and the only thing that makes it hard to speedsolve is the controls, but it's still really fun.
nice game. work on the graphics though (I always have trouble getting my graphics right). definitely add an on-screen reference thing in the corner. also, it may be worth while to add proper circle collision so the circle don't always go straight forward. you can find a tutorial for that or use a physics API. anyway good game i hope to see more.