I like this aesthetic a lot. Reminds me of Link's Awakening and Super Mario Land 2. I would definitely enjoy playing something like this but on a larger scale.
It would be nice if the circles you lock would change color. The yellow ring doesn't distinguish it enough when looking at a bunch of red circles. Other than that, fun game.
I didn't get the achievement either (using Chrome), but I went to chrome://plugins and under Adobe Flash Player I checked "always allowed to run" and it worked.
It started off fun, but when you needed to be perfectly precise near the end, it got pretty frustrating. There is a big difference between frustrating and challenging. I'm glad I beat it, but I didn't really enjoy the whole thing. Also, the physics for the fans were pretty wonky. If there ever is a sequel, I'd like to see less need to make perfect movements all of the time.
I got glitched on the last room of Fork in the Road. If you fall upwards, you can get stuck and if you fall out of that room, you will infinitely land on spikes and keep dying.