Seconding the feeling of icy controls. I did figure out the dash (after I was ready to close the game and happened to glance at the instructions again), but that still leaves the controls feeling very slippery. I think the biggest issue for me was that the camera felt very zoomed-in, so it seemed like once I was going at a decent speed I didn't have any time to react to the platforms. In the original Sonic games, the camera is zoomed out enough that you can usually see the entire arc of Sonic's jump without the camera moving, and it only follows him up or down if he goes high enough, like if he's on a spring or rolls up a ramp. Giving Sonic a shorter jump and making the platforms a little smaller would be a great start, as well as tweaking the movement speed and accelleration. The game jam was a very short timeframe and getting platformer controls to feel satisfying takes a lot of tweaking. If you're passionate about platformers, I hope you'll keep working at it!